Hey so i am on birth control. i had my period april 5-8th and then started a new pack on that sunday the 10th. i went on vacation on the 13th and forgot my birth control. I could not take the pills and then started another period on the 15th of april and it ended on the 18th. Is it possible to be pregnant if i had intercourse after the second period? Im really confused because i now dont know when i am going to start my period in may!? anyone help!