I've been bleeding/spotting for 2 weeks....?

I'm 23, I was on the pill for several months, (Ortho Tri-Sprintec) then my prescription was up and I didn't get another doctor appt for about a month and a half later to get it re-filled, so I've been off the pill for about 2 months now. My period was on time I guess (it's never been regular to a t) but usually it's really heavy and lasts about a week. But this time it's been more like spotting (sometimes a little heavier, but never as heavy as it usually is, I haven't even needed to use tampons really) and sometimes just a light pink. It's been like that for the past 2 weeks straight. Could it be bc I was on birth control and then I went off? Or could it be a sign that I'm pregnant? I AM ually active so that's def a possibility but could this be a sign of it or a sign of something else? Everything I have read online talks about breakthrough bleeding but I'm not on birth control right now so it's not that. It's just 2 weeks is a long time....