Well, do you only have vaginal sex? Like... has he ever gave your oral?

If he hasn't gave your oral or a hand job... and if you've never masturbated... then it might not even be the meds.

Like... I've never orgasmed from vaginal sex. I'm capable of orgasms, but it just doesn't happen (at least not yet! Never know! I get a lot of anxiety during sex as well and I tend to lose focus). But even without it... I still thoroughly enjoy having sex. It feels good physically and it feels nice to be so close to someone. Some people really only orgasism through clitorral stimulation, which you don't get as much of through sex.