So I started birth control (the mini pill) about 18 days ago and I had oral sex with my boyfriend. Only on the 16 th night. Near the end I started to play with myself and he had had not came yet but I was worried with his prejuclation semen going inside me and I haven't been on the pill long about getting pregnant. The next day because he had to drop me off for curfew we picked up plan b to be totally safe but this is like my 3rd time taking it! Should I be worried?