Hard to orgasm after SA *trigger warning*

I was sexually assaulted in May 2018. That October I started having a FWB and he never made me cum. I couldn’t figure out if he was bad at it or if my trauma had something to do with it. We ended in January 2019. I started seeing someone about a month ago and we’ve had sex a few times and I still haven’t had an orgasm. And I really want to! I’m super into him. But I just can’t tell if I have a mental block or maybe I’m just not comfortable yet. I can do it just fine on my own (vibrator). I’m in therapy but we haven’t talked about the assault yet