I'm 13 going on 14 and my normal period lasts usually 7-8 days, but in this case I've had it for over 3 weeks. Its light enough I don't have to wear a pad, and I don't have any cramps like I usually do. It's somedays light some heavy some days its barely there. It started a few weeks before I should have gotten my period and hasn't ended since. I'm a little freaked out and don't know if I should be worried.