I’m pregnant with my second but our first together

me and my fiancé are fighting. My daughter has been with grandma alot for the holidays for the sake of me working extra. Im currently almost 8 weeks pregnant with his child. I’ve been staying at his house so we can spend time together. We both Have 4 year old kids. My daughter and his son from previous relationships. Well since I started staying here he’s been arguing about the fact I’m a waitress not something high end and the fact his son isn’t sleeping in his bed with him anymore. I bring in over 50 a day in tips. And what does not go to bills at my place (my mom shares with me), goes to both kids and the household. My mom is never at her place always with her boyfriend so my daughter and i live there by ourselves when she’s with me. Where we live, me and my daughter have separate rooms, her own bed and her own privacy to an extent she’s 4. My fiancé owns a 3 bedroom house that his parents often stay at in the master suite. he allows his mom to hoard in the garage, the 3rd bedroom, basically anywhere that isn’t our room. The woman has 3 full storage units of stuff

and there is more nonperishables than ive seen at a food pantry and enough tupperware for 2 lifetimes. Even then it’s in here too I don’t even have a place to put my things because of it I live out of a suitcase. His son sleeps in our bed 90% of the time. I’m getting so annoyed I can’t sleep on a bed. Especially While pregnant! I feel like taking my suitcase and going to my mom’s house. yesterday and pretty much every other day before i hear “as much as i love sleeping with you my son should be sleeping here”. Over a month ago I offered to buy the child a twin sized bed and bedding for Christmas and he got mad. Seriously I almost left last night. I don’t know what to do I confronted him saying “if that’s what you want I’ll go stay somewhere else. The way you’re acting has me thinking this baby and i are just getting in the way.” All this while i was on the couch and his son in the bed the way he wants. It wasn’t until his mom came and told him his bed in her room was ready he moved his son telling me to come to bed. Usually if I’m here he sleeps on a folding cot in the room (Like a travel cot) Or in his parents room on a small toddler bed next to theirs. But he still gets mad. I get that his son was here first but i think he needs to put his foot down with his mom and get her to clean out the 3rd bedroom so the kids can stay in there. Am I wrong for feeling this way. Im exhausted because I didn’t sleep i was up all night crying.

Update: he asked me to move in 4 months ago. I agreed and it’s been gradually happening since. The lease on my mom’s house isn’t up until the new year.