Sex after assault

I was raped when I was 15, I am now 19 almost 20. I am in a long term relationship with my boyfriend, and it has been great! We’ve had sex multiple times already, but when we do some positions feel good but not super good and it is hard for me to stay wet and even harder to orgasm. Also when we have sex sometimes it is like I don’t feel anything at all down there. So if anyone has been through this type of situation before or anyone with good advice, I’d appreciate it! Thanks!!