help me

Jab • Mon, Sep 12

So I started Lo loestrin fe birth control like 2 months ago. My boyfriend and I have been having un protected sex ( he doesn't cum inside tho). I haven't had a regular period, just a little period for a day or two. I'm "15" days late and the last time we had sex was August 25. Could I be pregnant or am I just worrying too much?