Hi on may3 I did it with my boyfriend. He got out before ejacalation because we used no protection. I try not too stress but it's impossible. I'm not on the pill or anything but a week after we had a sports days and I got a elbow on my left breast not to hurt me but I could feel it hard during the week. I got my periods but their lighter and I got this big cramp at the beginning like normal and a small tenderness in my other nipple. I didn't loose weight but the fact that my periods are lighter freaks me out! We did it on the last day of my periods. Help me plz ! My periods was strong th second as normal butnow their light. Thanks for the help. I'm 17 and don'tknow what to do