Period spotting...

So I’m on birth control and this week , I’m not supposed to have my period. But lately I’ve been randomly spotting ! Is this normal?? I’ve been on birth control for 2 years now ! The last time I had sex was in January for the first time and after my period was a little off , but I still would get a period! But this last month, I didn’t really get a period and now I’m spotting here and there ! Should I see a doctor or has this happened to any of you? I also used protection when I had sex. Birth control , condoms and pull out all at the same time!