confused!!

So AF is due on 2/16 and I have been spotting for the past week like a brownish pink discharge. Would this just be ovulation spotting?? It's mostly when I wipe but I've wore a panty liner and some days I've had a little on them. How long should this spotting last? I've had hot flashes and slight headaches and sore boobs as well and suuuuper tired in the mornings. Like more than normal tired like almost a dizziness feeling. Anyone experience anything like this?? These were starting Monday last week and ending Friday.  I was on clomid 150 mg and metformin 1500 mg this month. And at my ultrasound on 1/30 doctor said I had a 17mm follicle!