I am a 15 year old teenage girl with a very inconsistent period. It often comes late or early, and currently my biggest concern is that I am currently in the 6th week of my period. The bleeding is very light, I only go through one or two pads a day (sometimes it completely stops and I think its okay but the next morning I ll wake up and it s not). Not sure if this next part is necessary, but the blood is dark brown or black and it s fairly thick in consistency. There is slight irritation down there as well, but it s very little and I only felt it today. I have never had sexual intercourse with another person, I m not on any medication that would affect my period - including birth control - and I ve never had any major health issues. I did try to talk to my mom about it but she said it s because I haven t exercised lately and I would really appreciate a professional opinion.