I'm not getting pregnant

basically. I'm 20 years old and I am on the pill but I haven't been taking it properly for about 3/4 months now and having regular sex where my boyfriend isn't pulling out lol (I've been missing it and taking it improperly) now, it's not that I am TRYING to get pregnant right now but also I wouldn't really mind if I did as I am in a job and have my own house and am in a loving relationship and also really do want a little member to thefamily . It's just I'm worried, the fact that I haven't been caught out yet. I did catch clymidia (from a cheating ex boyfriend) but I got that all sorted out and I'm thinking in the back of my mind this could've effected me. is it just me or am I overthinking and being paranoid. I know the pill takes a while to get out of your system so that could be the reason.. just wondered if anyone could give any advice or have a similar experience. thank you girls in advance.