Can trauma cause lack of orgasm

Tim very happy with my boyfriend and I enjoy sex but we have had trouble with me being able to orgasm (and same with masterbatinh) I get close and start twitching and it kinda hurts so I push him away or stop what I’m doing, I have been so confused because I have orgasmed in the past. Today I realised it could be because of my trauma from SA. Is this a thing? And how do I fix it? And if it’s not trauma what can I do? Why I’m I twitch? And why does it hurt?

So many questions haha