Me and my boyfriend had sex on the 11th of this month and i had lost it to him (was a virgin). My period is soposed to come around the 28th to the 1st of november but im experiencing minor cramps here and there witch had started around the 22nd and 23rd. I feel like my breast had gotten a lil bigger as well plus my stomach is a lil fatter as well. But im not spotting or any other signs of pregnancy. Is this a sign of me being pregnant or just the plan b side affects kicking in. Im 107 pounds at that. Im real worried and scared.