My last period was last Sept.17, 2013 ended on Sept. 23, 2013. I'm supposed to have my next period last Oct. 17, 2013. The 19th comes and still nothing so I thought i was late and i thought it is safe to have sex, so we did it on the night of 19th. Withdrawal method, my boyfriend didn't come inside me. He pulled out even before he feels it. I drank 2pcs Althea Pills after the deed knowing it can prevent pregnancy. But its almost the end of the month and i still don't have my period. I don't feel any symptoms of pregnancy either. I took a pregnancy test and it came out negative last Sunday, October 27 and my boobs got swollen but this usually happens when my period is about to arrive. im still taking the pills until this very day. is it just the effect of the pill? or im just stressed? please help :(