Help please

So me and my fiancé have been fighting a lot more since we found out I’m pregnant when he doesn’t drink and I talk about the baby he says nothin but when he’s been drinking he has no problem talking about the baby he brings up my social media from two years ago that I deleted everything right in his face so we have no further issues after he promises me he won’t bring it up so we can move forward so yesterday he lost his new house key accused me of taking it when we live together 🙄 then he even told me he feels the baby isn’t his anyways we been together for almost six years but living together for two I moved from Cali to show him I wanna be with him now I’m alll the way in Tennessee and he says the baby’s ain’t his when I don’t go nowhere without him or walk by myself because I don’t know the area what should I do I’m heart broken I adore him so much 😢😩