I have been on Avaine birth control for a couple years now, and I hardly ever miss a pill. Me and my boyfriend have unprotected sex every time we see each other. Is there high enough risk of me getting pregnant that I should worry? I've recently gained weight, been nauseous, and extremely sensitive(almost everything makes me cry now...). I may be paranoid, but I just need to know how well Avaine is protecting me from getting pregnant. Thanks!