Hi girls , so im three weeks late on my period, I don't think of if ever been this late on it before im extremely confused. I keep spotting on and off from light pink to dark brown . These past couple of days if been cramping. Iv taken about 4 Hcg test iv gotten from the dollar store all have come out negative. Should I buy a better brand? This morning I found this in my pad of never experienced this before have any of you ? I'm very overwhelmed from all the confusion so any advice will be

greatly appreciated.