I am 16 and have had my period for around 3 years. I have never being very regular especially due to GCSE stress but now after GCSE's I am not very stressed but have not had my period in a few months and I have never done anything sexual. A few days ago I noticed a bit of blood and brown stuff come out of my vagina. This is still happening. It is tiny and nothing like a period and to get personal when I urinate blood or brown stuff doesn't come out but when I wipe its on the tissue. Is there any reason for this I am very concerned?