I had sex with this guy about a week after my period. I took plan b the following morning. Then about a week or so later, I was at a party, got a little too drunk and apparently engaged in sexual activities. I was told he pulled out and there was no discharge the next day so I believe he was telling the truth. But when I got the plan b period, it was about a week after the 21st of June. It's the 24th of July now and no period. But I have cramps, which is my only usual period symptom, but no period. I'm really paranoid now. I read that the plan b could mess up periods. Am I being a little too worried too soon? I have a boyfriend and I know I screwed up by letting myself get that drunk but its too late to do anything. He cant know and I'm worried. Again, am I worrying too early?