birth control

I'm normlly good about my birth control but the last 2 packs I missed pills a few times and it was kind of a mess, this most recent pack I've been a lot more careful, however in the middle of the pack my period started. It's been really light, lighter than normal,  and more brown than red since it started last Sunday. It's been a week and it's still going, which is longer than normal, and still really light. Should I be worried?