I'm so heart broken...

My relationship feels more like ownership and slevery than am actual relationship with gives and takes and working together. We just bought a house I'm 24weeks pregnant with complications and take care of our other two children everyday as I'm a SAHM, but my dishes are always done, the laundry is always going, I vacuume the floors, I take out the trash, I make breakfasts, lunches, and dinners. But because we have some ant problem and now I found a roach it's all my fault. That I don't go behind my children enough to pick up every little crumb or nibble of food that falls on the floor. I vacuume every day or every other day, I keep dishes clean everyday my sink is always empty before bed, I clean our dining room table, I clean my counters and my floors is there's a mess or crumbs after eating, I do ALL the laundry etc etc etc and I'm the one whose made to feel nasty I'm the one who caused the problem. We have been here less than two months and it's all my fault for the problems. Everything is always my fault. Just like he gets to buy himself a new bow, a new kuerig(I don't drink coffee), he gets a new play station game but I ask to get something for myself or want to spend a little money on myself that I NEVER do then I'm wasting money and I'm being ridiculous. It's "our" money but I'm being made to feel like unless it's a necessity then I don't need or have to have it. Even if it's just nail polish, or a new clothes. I guess I married into the wrong life. The wrong person. But what am I to do now with two kids and one on the way with no job. I feel so trapped and so heartbroken. He makes me feel worthless and nasty.