What do y’all think?

So I had unprotected sex on 2/16 started my period two days later. Well I didn’t think anything about pregnancy cause I’ve always been told you can only get pregnant during ovulation. But for the past two days I’ve been so nauseous to the point where my mouth is watering and everything. I’ve never had that while on my period. Do you think I should take a test? Or is there not even a possibility of pregnancy?