So I've been on the pill for almost 2 weeks now. About 2 days ago I started getting this brown discharge and then now I am having what seems to be a period. It's very light but I am getting symptoms like back ache, cramps, and I'm really irritable. I'm really confused why this is happening since I'm not supposed to have my period for another couple of weeks. Could it be that the birth control is'nt working? If it helps I'm taking Trinessa.