me & my boyfriend didn't have intercourse but fooled around and were both scared but unsure semen could of touched my vagina so i took plan b approx 14 hours after. a week later i had what i thought was my period but only lasted 3 days when it usaully last a week. it was brown at first then went to a very heavy red period for 2 days and now it's gone and i did have cramps. i'm afraid if i'm pregnant or not even though we didnt have intercourse