I feel so guilty

I tried for a while to get pregnant. It was all I wanted and dreamed of. I am now 26 weeks along. I feel that I’m not ready for a baby now and that the man I’ve chosen to father my child will be a horrible partner after I give birth (he’s extremely short tempered, especially when he hasn’t gotten much sleep). I’m worried I won’t be able to handle it. I watched my nephew overnight a few times and I cried and called my sister to come get him more than once. All I wanted was sleep and I couldn’t stand the fact that I didn’t know how to soothe him. I don’t know if it’s normal to feel all of this or not or if anyone has experienced the same feelings. Please don’t be rude or mean to me, I just need advice. Don’t get me wrong, I love my baby even though she isn’t here yet.