nausea

I don't think this has anything to do with my cycle but I keep randomly getting really nauseous. Like every morning I can't eat unless I've been awake for 3 hours, even if I'm hungry I feel like I'm going to throw up. Sometimes when I smell food I get nauseous and sometimes I'll just randomly get nauseous a a little dizy. I'm not pregnant and there's no change that I could be. This have bees going on for the last year give or take.