I recently was taking birth control pills in sept. I was having a period every 28th day of the month. I took them for 3 months and then discontinued the use of them at the end of nov. I can on my period for a day. This month i came on my period on the 29th and stayed on for 5 days. me and my boyfriend had unprotected sex a day after my period. I also forgot to mention that I have pcos. My doctor prescribed birth control pills to help my period get back regular. Could I be pregnant?