Could I be pregnant?

Ok so I’ve been on birth control for a year and a half and I’ve switched a couple times because of some of the side effects and I’ve finally found one that’s worked for me (no spotting especially) and I’ve been on it for probably over 6 months with no problems at all. I started having sex with my boyfriend almost 2 months ago (we use a condom every time) I still have a week left until I’m supposed to get my period and I bled a little brown yesterday and today, should I be worried? (I’ve never spotted while on this specific pill)