did I have an orgasm?

I've orgasmed once or twice in my life *pretty sure*.. both from masturbating. Today I had shower sex with my boyfriend and it was SO amazing. After going at it for a bit, I started feeling a sharp sensation in my stomach, so I was like.. orgasm question mark? But the feeling wouldn't go away! Every time he thrusted it intensified and just didn't pass!! So I was like whatttt.. we were doing doggy and every time we do it gets me 😉👏 but this time the feeling was so much more intensified. I know orgasms can last for a while, so was that it? Or was it just because he was reaching deep within me? (He's pretty sizeable.) thanks in advance!!!