Seeking Sex Advice

hey! I’m a 20 year old female and am typically very sexually inclined with the right person. My current partner does all of the tips and tricks that feel great and I really enjoy, but for some reason I have a really hard time actually orgasming. I don’t have any issues when I’m masturbating but it’s almost like I get hyper focused on other things and don’t feel as much pleasure when I’m with someone else. Does anyone know what the cause of this may be or if I can do something to relax a little bit more when I’m having sex? I’ve had some past experience with sexual assault and assumed that may play a part but it hasn’t ever been an issue within my relationship or something I think of when we’re together. Any advice is welcomed ☹️