abit worried

megan

I'm a little concerned for myself... I am now 22 years of age and I've been with my partner for 3 years. I've been sexually active since I was about 15 and until I was 20 I was on birth control. since then me and my boyfriend haven't been using any, however I haven't had one pregnancy scare or second thought. I thought I did have sex enough for us to get pregnant by now, but nothing. can anyone shed a little light?