Did I have an orgasm?!?!?

So when I was younger I used to masterbate before I realized that it was against my religious beliefs (I am Catholic) and if I rubbed my clit sometimes my body would tense and then I would get a sense of relief and it would feel like I couldn’t keep going after that point. There were also times were I felt weird muscle contractions but it didn’t make me feel good I just felt super uncomfortable and worried that I was having an orgasm. Can you have orgasms without realizing it? Also, can you have uncomfortable orgasms that you don’t enjoy? I never enjoyed those parts I only ever liked the building of tension.