Suggestions as long post sorry

So this is what we are dealing with.....

we live with my FIL/ my husbands father obviously and his grandpa and since we have moved in we have always paid for something at first it was our own bills we had and then because we were the ones that had to pay for emergencies like plumbing, fixing other things, house hold items that broke and I took care of grandpa when he got sick and I cooked and cleaned when FIL lost his day job at his company and had to go to night shift at his company so because we had to do that his father took over some of our bills like just car insurance now and his dad use to go and do all kinds of things with us we’ll my husbands brother lost his job and ended up having to move in with us after we took him his kid and my FIL on vacation paid for ALL of it food housing events and his brother is very lazy we have to raise his kid he won’t take him to the doctor when he’s sick until he gets tired of hearing me and my husband complain about it all he does is be in his phone and play video games 24/7 and he’s got a job at a gas station but doesn’t do or pay for anything doesn’t even pay for his own food when we go out as a family to eat and my FIL pays for all his bills and lies about it took insurance money to fix our fence a storm blew down and flew the brother out to California to meet his online GF and now there’s no money for the fence. I work currently on disability through my work for pregnancy related complications and my husband works from sun up to sun down then comes home and does the yard work fixes what needs to be fix and currently studying for a test he has to take for his work. His brother had made the FIL soooooo incredibly lazy it’s not even funny he won’t get up off the couch unless to get food or something for the brother. First off we are the only ones that clean this house and We have deep cleansed this house so many times people I cant even count and we ask “please keep it clean” and it’s trashed within the next 2 weeks we just recently deep cleansed back in June for guess what you guessed it my nephews birthday party because the brother went out and played all week and weekend all the way up to the party (by play I mean go out with other family friends to zoos and museums that me and my husband was invited to but we couldnt go because we had to clean cause we are the only ones that do) and let me tell you how nasty it already is wet towels laying in the floor for months because me and my husband gave up and maggots somewhere can’t even tell where. and we now have a baby on the way I only have 3 more months and I asked for them to help me clean like deep deep clean wash ceilings wash walls etc the deep nesting clean you do lol and they said “we’ll try” am I over reacting when that sets me off to no end ? The FIL only works friday Saturday and Sunday and the brother works 8-3 Monday - Friday when would they not have time to help me clean when they have free days and afternoons and all they do is watch tv and play video games!!!!!!

Another thing is they won’t take care of our nephew and I can legally only do so much currently I told them weeks ago that if they didn’t get a hold of his allergies the snot could catch viruses or bacteria and potentially cause him to get sick nothing was done I even bought the medicine for him and last night I walked to the kitchen and noticed his face was really red and the brother and FIL said it’s only cause he was under the blanket and I said okay make sure he’s okay it wasn’t til hours later they realized he had a 103 fever and guess what he has a respiratory infection what I told them would happen but they never listen to me.

I just don’t know what to do because mine and my husbands credit was ruined where we had some complications with my work and I had to leave for a short while to take care of our grandpa (because the brother couldn’t do something as simple as that gpa needed a breathing machine and the brother said the nurse said not to use it that was not true and the brother also said that the nurse said not to give him insulin (he was diabetic) until at bed time when he really needed it after each meal how do you confuse those things he almost killed gpa) and we got over loaded with bills that ruined our credit score... and all the apartments around us run your credit so we can’t get our own house now... I’m just going to go crazy and loose it idk what to do and it’s making me so overwhelmed and have severe anxiety.