So I've been having this problem since around February time I think it was, and that is that I become very nauseous when I'm due to coming onto my period, and it's not just like a little bit, I genuinely feel like I could throw up at any time and most of the time I do as well. I don't take any form of contraceptive pill to make me feel sick because I know some of them can, it just seems to happen the week before I come on my period.