9/11 had alot pink spotting, 9/12-9/13 brown spotting, 9/14-9/19 medium blood. i never have pink discharge. a week early before due. is this a period?

Pre-period bleeding: If not on oral contraceptives, sometimes ovulation does not produce a "normal" follicle (area productive of hormones in the ovary after release of the egg). This will result in incomplete progesterone manufacture in that cycle, causing varying forms of early bleeding. If these kind of cycles continue, see your healthcare provider for advise.