About a month ago in August, my boyfriend and I tried to have sex for the first time. The first time happened on August 15th. We used a condom but it broke while he was going in however we decided to go ahead. I felt that it was too painful within 3-5 minutes so we stopped. He did not ejaculate inside of me. The next day I took Plan B. Three days later on the 18th, the same situation happened except that time he broke my hymen. Again I couldn't stand the pain and he did not ejaculate in me, so we stopped and I took Plan B again two days later. I had gotten my period on the 7th, and on the 31st I had something like a light period. There was a big bloody spot on my underwear in the morning and through the next 2-3 days it was just brownish discharge. Could these be after effects of Plan B, or could I have gotten pregnant from either of those two times? I'm really paranoid about it and I don't want to worry myself because it could make me irregular. I should be getting my period within the next few days...but I'm really concerned about it.