What is going on? I am currently on birth control but not using condoms during sex. Last month I had a light period and only bled about 3-4 days out of my typical 7 days with only one day being slightly heavier than the others. I have been having sex but I am regular. Have never missed a period or had bleeding between periods. I started lightly spotting with brownish dishcharge here and there on the 15 i believe and it only appears at times. I spotted even lighter on the 16 and nothing on the 17 only when I wiped. Now on the 18 I spotted a bit more but no need for a pantyliner or anything. Now today its more brown and I do have a liner on and have some spotting on it. I do not begin my inactive BC pills till sunday- so currently I have 3 pills left. What could this be? Is it an infection of some sort? Please give any advice possible.