15, am i pregnant? im really confused thank you?

basically i got my last period the 12th of april. i started b/c the 14th. i missed pills april 24,25,26,27,30. i had unprotected the 17th, and the 26th. i took one pill the 29 and two the 30th. i stopped taking them the 20th. may 2nd to may 4th i had realllly light spotting and light cramping. i had pull out the 7th of may and unprotected last night. i was suppose to get my period two days ago but i dont know if that bleeding i had in may was my period or breakthrough.. what do you think? Thank you!