hi guys im new to this.... Im 15 years old and was put on birth control to help my endometriosis well my doctor told me not to take the inactive pills and only take the active pills so i wont get a period. ive been on the pill for a little over a month and im still having breakthrough bleeding and lately my breast have been sore and it feels as if i have PMS (like cramps and all)

ok this is what im so worried about... me and my boyfriend was fooling around last weekend and his penis touched my vulva but he did not ejaculate now im not sure about precum but anyways im scared to death that the PMS symtoms are like early pregancy signs and the worst part is that i wont even get my period to know if i am pregant or not... ive heard that birth control doesnt always work and im just scatred so if any one has any advice i would love to hear from you THANKS!