Frustrated.

I love my husband but we just aren’t fitting together. Like seriously. Our sex hurts he is just to big for me. When on the rare occasion I can take it I get raw within minutes. Yes I’m plenty turned on yes we’ve tried more foreplay get in really wet. Still painful. I’ve been with other guys and this hasn’t been a problem. It literally feels like my insides are just getting stabbed with a big old baseball bat and then the rawness from the girth is Terrible too. Is there anything I can do? I’m five weeks pregnant and my sex drive has dropped because I have this irrational fear that him in there will mess things up. I’m not exaggerating, it’s ridiculous. There are only a few positions I can handle and I want some sex freedom. Help!!! Tia