I had what i thought was implantation bleeding and cramping on the 14th-15th with brownish discharge when I wiped on the 14th, and then just bairly visible on the 15th. Then there was little flex of bright red blood in my discharge on the 17th but no cramps. My period isn't due until the 21'st and i'm on a 28 day cycle. But today, the 19th, I started having period cramps. I had only been on BC for about a year before I went off of it 4 months ago. I had been feeling a constant light pressure in my stomach and lower abdomen for the past couple of weeks, along with constant knee and leg aches, but now I just feel period pains. I tested yesterday, but got a negative. I have a feeling it's going to continue to be negative since it really does feel like my period is coming on. But I was wondering if anyone else had felt implantation cramps a week before period, then felt period cramps when it was time for AF. Any advice would be very much appreciated!!!