Is it normal to think sex is kind of gross?

I’m 21 and my bf always wants to have sex and I’ve been refusing for the longest time because it freaks me out with all the body fluids and everything.

We just had sex today for the first time and after he came in me I threw up so hard and was shaking because I felt so grossed out. I mean I love my bf and the sex felt good but is it normal to feel like this?