What do i do??

Here’s a little back story- a few months ago my water pipes broke at my house where my boyfriend and I lived with our daughter. The landlord said we needed to fix it because she “didn’t have the money to fix it” but we didnt either really. So we stayed with my parents to try to save up some extra money to get it fixed, but while we were doing that the landlord found someone to fix the pipes but she told us if she had this man fix it she was going to let his family move in for more higher rent. We argued about it and ended up having 30 days to get our stuff out so we did. We moved into my boyfriends grandparents house since it’s a 4 bedroom house and it’s just them two here. Well here’s the problem, it is like infested with roaches so bad to where I’m hating where I’m at. My boyfriends grandmother gets an exterminator only every 2 months or so and when the exterminator comes she doesn’t even spray every room in the house she only does the living room and the kitchen and puts some of the sticky tape things on the floor everywhere. I clean the house almost daily but it always gets ruined and a wreck because his grandmother doesn’t like to clean. I’m currently pregnant and not able to work due to high risk according to my doctor so I stay home and clean all day but for what? It’s not like she’s helping me with the situation. She told us she wants us to take over the house since they’re getting so old they just want to move out. But if they do and we take over I feel like it’s going to be nearly impossible to get rid of these bugs. Weve been looking at houses to rent but it’s all so high for just a 3 bedroom I feel like we can’t do it especially not with me working right now. I feel stressed and disgusting every single day. I don’t even know what to do anymore. I wish I could go back and stay with my parents but there’s not that much room there. I feel like everything is falling apart.