I have been on the birth control ortho tricyclen lo for almost 8 years now and within the last 6 months began taking minocyclen. I have been having normal on time periods up until the last two months when I began having breakthrough bleeding for one day a week before my period. Periods seemed to be normal when they came. About a week ago I started having a dull aching feeling in my uterus which seems a little weird. I always take my birth control at the same time and RARELY miss a day. My boyfriend and I almost always use condoms also. No other pregnancy symptoms yet. Could I be pregnant?