I am a 17 year old female. I've only had my period 4 times starting when I was around 14. Every time I've had it it's been very heavy and i'd have it for about two weeks to two and half weeks. I'd have painful cramps but they weren't unbearable. Now i'm on what I think is my period? It's very light, so light I don't even have to wear a tampon. I do have some cramps. It's been about a week now that this is been going on. One morning I woke up and had very dark almost brown blood, but it was very little. I'm not sexual active.