I'm worried...

My boyfriend and I have been together for 2 years. I would say I was on and off birth control for the first year, then stopped around 8 months to a year ago. I haven't been keeping track of ovulation or anything but I know according to this app I've been ovulating multiple times when we've had sex. I'm just scared I cant get pregnant. We haven't used protection ever besides the birth control. He doesnt pull out. We both do smoke cigarettes which I know can effect fertility but I feel like if I were able to get pregnant I would've by now. We have unprotected sex almost every day/every other day for the past 2 years!