HELP-DISCHARGE

can someone please help? im not due on my period for another week, however ive been having small amounts of browny pink discharge since last night, so anxious that it is something bad:'( im being inspected for endometriosis, could it be this? also could it be ovulation discharge? im so scared, im 22 and had an ultrasound last month (transvaginal) and she said cervix looked okay