I actually had a sleep study done a few years ago as they wanted to rule out sleep apnoea. I used to snore atrociously apparently (when I eventually got to sleep) but sound like I was gagging or something (I don't snore as much now, but I apparently do have my freight-train moments LOL).

I didn't have sleep apnoea, but was told I was a primary insomniac LOL.

I don't know a lot about sleep apnoea, but just thought I'd share that LOL.