ive been on the pill for about 4 years, but about a year ago i came off and about 3 months ago went back on the same pill again, i have had no problems with my pill what so ever, until about 3 days ago, and now im getting brown jelly like vaginal discharge, im getting cramp but not a usual period, and im not due my period for a week. is this normal? or something i should be worried about??