Pulling out, Condom and birth control... please help?

I am currently 17 and i havent had alot of . ive kinda been seeing this guy for a few months now. We dont put a title on wat we have we just enjoy eachotehrs company. Well we decided we wanted to have and with his recent history of not wearing a condom i told him if he wanted to sleep with me then he would wear one. Well i have also been on birth control for about three months. but even still i am so petrified of getting pregnant. The two other times i had i felt like i always needed a morning after pill just to reure myself that it would happen. But they are so expensive at 50 dollars a pill. Not only did i make him pull out i make him tell me before he climaxs so he can pull out. Well round one was fine, and he did pull out, but then alittle while later we went for round two and everything was fine. I still cant help but feel anxiety, and ive got three more days until my period. Wat do you think are the odds that i could be? and because i took these steps do u think i have better chances of avoiding being prego?