Feeling unhappy

I am almost 12 weeks this is my husbands first child as I had 2 before with ex. I am feeling very over worried and have great feeling of unhappiness. I worked full time up until a month and 1/2 ago and now stay home with my boy. Which I love because I felt as if I was missing to much with them. Now that he is the full time worker I feel helpless. I do not have my own money I can't do anything I need to do. We live in a small 2 bedroom that we get for being onsite caretakers. He works outside of the home and feels as if this space (less than 800sqf is fine for 5 people) is perfect for us to stay at. The office of the buliding is my kitchen people knock on the door at all times and we have no privacy what so ever. He also was not the best house keeper when I worked full time and never cooked dinner had to fight on my days off to clean or do it myself. Now that I am.home I do clean and cook dinner have it ready for him when he gets home from work,it's never done right or all the way done he says. I am here with 2 kid,pregnant and I run everything around here as well as take him to and from work. When I worked he never had to get up and bring me to work or pick me up more than half the time I would have to come home from my job and then do the things at the the apartments he said he would do days ago cook, dinner and get everyone ready for bed. I am feeling like his expectations are set a million times higher of me than I can ever expect from him.and if I say anything I am being a nag. I also feel that I can not express my feelings about thing to him as he get all puffy and thinks I am blaming him for how I feel when really it's just how I feel and because I haven't had time to see anyone that I can talk to or feel i cannot talk to them as I do not want to burden them with how I feel right now. I don't want to be the downer. I just don't know anymore. Maybe I am the one that is really being mean and not trying. I don't know I am sad but I do not cry I just get crabby. Needed to vent and would welcome advice and would like to know if anyone has had such a switch in rolls and felt that the expectations were set higher for you?