Nauseous

I’ve been feeling nauseous for about a week now, maybe 5 days. Every morning after I shower I’ll feel really hot and almost to the point of throwing up because my stomach would just hurt, I could feel myself about to throw yo but I haven’t puked yet. It kinda started when I started to take vitamins (hair , nails & skin ) gummies.. I take 3 of them when I wake up.. and I also got other gummies called “sleep” you take 2 of them 20-30 mins before you go to sleep. Idk if they have to do with me wanting to puke. I don’t think i could be pregnant? I mean yeah, me and my fiancé do have unsafe sex. But everything else has been normal like I’m sill eating the same as I always have been. Nothing else has changed. & it’s only in the morning during the day & night I’m totally fine.