Post pregnancy sex question

So my baby is two months old now, but this has nothing to do with him. I think about sex and my stomach just gets queasy. And my fiancé wants to jump back onto that horse. I don’t know what to do, because it feels like I don’t have a sex drive anymore.I keep telling him this isn’t about him it’s me I just don’t feel ready kinda scared. And he said something along the lines of “maybe we just need to re spark what we used to have” so I said okay, we start kissing and everything obviously I’m getting hot and bothered but something hurts down there and all we were doing was kissing idk if that’s normal. I can tell he’s sexually frustrated and I don’t know what to do for him because I don’t feel the same anymore, him even asking me feels more awkward than it did when I lost my v card