What will make things better?

I'm going to try to keep this short as possible, currently 28 weeks pregnant while a sahm to a 14 mo currently living with my bf we all sleep in the same bed same room in a 3 bed apartment with his dad Ina another room, his cousin in another room, and his uncle sleeping in what used to be living room. We've had mice the last 2 years and they won't go away no matter what we do, there always droppings everywhere that's why I don't let my LO walk around, literally feel so cramped with no room for anything, don't have a front yard or backyard (in the city) and barely go outside. I feel like a horrible mom Ms.Rachel has taught my LO basically everything and my partner says I'm not doing enough for LO by not playing with him, staying ontop of the dishes and laundry and not mopping everyday. I have a semi big Playpen for LO that he plays in occasionally but majority of the time we are in the bedroom all day and I know it's not good for him or me, I don't have any money, currently behind on bills credit is shot, no job experience, no car, and right now feeling like a horrible person. Also feeling very insecure no clothes fit me and I feel and look like a beluga whale 24/7. I plan on tandem nursing and am worried how my LO stills nurses to sleep how that will be with the new baby and how I am already feeling so down and overwhelmed what will happen when next baby is here, what do I do honestly to get more energy and get more things done, or to be more present with my toddler physically I'm tired all the time and mentally I'm stuck in my head most of the time. My bf is working as hard as he can and overall is a great person. I know a lot of this is from my environment but I seriously need to get out of my head and get some energy any tips or advice will be helpful thanks