Everytime I sleep, I always groan so loud that I wake up other people in the house, I don't snore, but my dad says I sound like a cow. I have even woken myself up while doing this and I can't figure out why I do it. I used to have huge tonsils, but they and my adnoids and a pollup in my nasal cavity were surgically removed. I didn't do it before then, could it be something the doctors did?