Doesn’t want to stay over?

We are dating for a while now, I’m 6 months pregnant... we did not plan on becoming pregnant so fast but things happen and we are SO grateful however, we are in the process of saving for a house so we live with my parents in the meantime (we are 24) .. but he never wants to sleepover? He used to sleep over all the time yet lately he always wants to go home? Nervous when the baby gets here he will not want to stay the night....he’s overactive and has ADHD..maybe bc I’m pregnant and want to lay down and relax a lot he can’t? I don’t know why he won’t stay with his pregnant girlfriend...am I overreacting with my hormones? I’m taking this kinda personal idk