Dream Orgasms

Wondering if this is common. I've only had one sex partner and well sex was good but I was never able to have an orgasm. I wasn't sure if I ever did until recently when I started having "wet dreams". I would semi wake up having rapid breathing, aroused, and like shaking, I'm guessing those are orgasms!? I don't even remember the dreams. How common is this? Getting orgasm during sleep but not with my partner.