so I'm on the pill I have missed a few days for the past cpl of months but had normally been getting my period every month. now this month. my period isn't due til this week cause I'm in my last week of my pills. on the 23-25 I had some very light pinkish/red bleeding. I'm just a lil confused. could it be that my period is off from missing the pills or could that be implantation bleeding??? advice need please... HELP ME... also lower abdomen has felt heavy when standing.