ok ive been taking lo estrin 24 fe for about four months now. After two months i skipped a week and then started a new pack on that sunday. Three weeks into that pack i had unprotected intercourse, and at the end of the month i had my cycle on time and it was no different form my regular cycles on the pill. I am now two weeks into the fourth pack with 10 with pills left. Friday i noticed brown discharge. It goes from light brown to dark brown and ive seen some blood. Its not heavy at all, its very very light. I usually take my pills the exact same time everyday but with a few days on this pack ive taken them an hr or two late. I don't think im pregnant because i had a normal cycle last month (a week after intercourse), but i have been stressing some and with this spotting ive had mild headaches and cramps. I also have a history of cysts. The pharmacist told me that she didn't think i needed to take a pregnancy test but im kind of worried. What could be going on and how long should i expect the bleeding?