Fertility

I have an extremely irregular period and having sex with my boyfriend makes me extremely nervous! I'm not on any birth control anymore, we occasionally use condoms but we usually just stick with the pullout method. We've been doing this for quite a while and I haven't gotten pregnant, but reading all of the experiences of getting pregnant using birth control makes me nervous! I was wondering ways to track if you are fertile/ovulating with an irregular period. What do you guys do?