I had unprotected sex and at the time had missed 3 of my birth control pills. Because of this within 42 hours I took plan b. A week after taking Plan B I started a new month of birth control pills. I am now (according to my calender) almost 2 weeks late. I have been having period symptoms but no flow. Could the Plan B and the delay in starting birth control pills have messed up my period? Having no pregnancy symptoms?