whats the difference between orgasming and cumming?

i am a girl and today my boyfriend was eating me out and i get the feeling i usually do everytime i masturbate like i just came but he told me nothing came out so im wondering if i had an orgasm or i came? what is the difference between orgasming and cumming? does it feel the same? when i was “cumming” i started to shake and moan a lot like how an orgasm is described but now that he said nothing came out, im starting to wonder if i have never came in my life and its just always been an orgasm? can someone let me know