Mini rant- sex and pregnancy

So I’m 14 weeks pregnant right? My husband and I have been working on mortgaging a house and my husband is working on getting promoted (for the baby)... well with the mortgage, pregnancy, job, and my college work, I’ve been super stressed. I don’t have much of a sex drive and idk I feel like my husband isn’t mentally here, if that makes sense. My sex drive finally went up and we had sex for the first time since we found out (amazing by the way).. but immediately after he just got really rude. He just started being mean to me so I left him alone... I can’t help but feel like it’s all my fault that he’s so distant and crap. I mean maybe he’s cheating but I doubt it. I’ve attempted to discuss it but he just says he’s stressed and he’ll fix it. But he’s still distant and short tempered... idk what to do 🙃