I already answered another post of yours, and it sounds like you might have already replaced the soil. (You can read my comments in that other post) Anyway, two things stand out in these pics: (1) no mulch (2) other stuff in the containers (lemon peels??) If you have pictures of the fungus that is now on the foliage, that might be helpful in diagnosing the specific problems you're now having.

Trust me on this--this is a 'bat your head against the wall' situation. You CANNOT change your parents. You CANNOT change your brother. All you can do right now is step back, see the situation for what it is and realize that your parents are going to give this deadbeat whatever he wants, for the rest of his life, and there will be nothing for you, ever. If you speak to professionals in the field, they'll tell you it's common for parents to over and over again put the 'needs' of a deadbeat child over the good of their other children and even ahead of what's good for them (the parents). Parents will often let one child bleed them dry. And oh yes, they will from time to time go to one of their other children, complaining about the drain on their finances--BUT they rarely really want any help. And if you do attmept to push them to do the right thing--guess who will be wrong and will be on the outs with the family? You. Not only have I seen many other families go through this same scenario, but let me tell you about DH's family. His one sister has always been a taker. She's got all sorts of explanations as to why she needs money--mind you, her husband has a very high position with the government and has made 6 figures for years. Anyway, this deadbeat, over the years, has gotten her parents to pay for: her kids' braces, her cars, her appliances, new roof for her house, and dozens of other stuff. FIL and MIL used to go to DH, complaining about the drain on their finances. DH would get all upset, worried for them, and make good suggestions. They didn't want to hear anything reasonable. Eventually, that SIL finagled and got control over their finances. the stress she put FIL under killed him way too early. Then she STOLE over a quarter of a million $$$ from MIL (who by that time had Alzheimer's). Cost us $20,000 so far in forensic accounting and legal fees to stop the hemmorage of $$$$. It's been 7 years, and the case still hasn't been completely resolved. And honestly? There's no money left in the estate for the rest of the children to inherit. I don't care if I NEVER get any money from someone else's death--that's not really how I choose to make $$$, but darn it, it's grossly unfair for one child to steal the estate from the others. If I knew in my eary 20's what I understand now about these family relationships, we would NOT have allowed ourselves to be victimized the way we were. We would have walked away years ago. I know that sounds cold, but we batted our heads against the wall for 35 years, always doing the right thing, never taking a penny from anyone that wasn't ours, and none of it was appreciated. ever. I know this isn't the advice you want to hear, but truly, the best thing you can do for yourself, is to handle your own fiances responsibly. To protect them from others, and to make up your mind that if your parents choose to give away their money now, to a child who should be able to pay his own way, they ARE NOT your responsibility in the future, when they are down and out because of it. Do not feel guilty if they come to you for help later in life and you feel you need to turn them down. They made their choices, it's not up to you to pay the consequences for others mistakes, truly.

I can't see anything wrong with your plant, but there's a lot of mis-information regarding housplant care, so this info below will help keep your plant on the right track. FLFs love lots of light, eastern light is not very strong and this plant would do best right up in front of an unobstructed south facing window. If it can only reside in this room, it needs to be right in front of the window without the blinds blocking the light. You could even place in on a plant stand or table so that the leaves can catch as many rays as possible. I'm not sure the mirror has any benefit since the reflected light is diffused, but it's certainly not hurting anything. I would however stop misting because it does not improve humidity and sometimes invites pests. If you're interested in increasing humidity you should look into using a pebble tray, but the humidity in the South-East during winter isn't too bad, so it's up to you. The leaves may be drooping due to the soil being too dry currently or the soil retaining too much water. I don't think that plastic bag under the pot is a good idea as it can trap moisture inside the pot. Watering with three cups of water likely didn't water the plant thoroughly. Good watering practice is to insert a wooden dowel or bamboo chopstick all the way to the bottom of the soil - some people think checking the soil with your finger is effective, but it only evaluates the top inch, the bottom soil could still be soggy (over-watering is a common issue). If the dowel comes out wet with soil clinging to it, the soil is still wet and it is not time to water. Check every few days until the dowel comes out clean and dry. Then water thoroughly so that water flows freely out of the drainage holes in the bottom and then let it rest for about 20 min so the excess water can drain out, this is easiest in the shower or kitchen sink. Don't water again until your dowel is reading dry again.

@dbarron no, nothing is blocking the window. we only keep the blinds down at night so it gets as much daylight as there is depending on the season so definitely a little less now