Luckily I've never really suffered from bad periods, mine have always been around 4-5 days, with days 2-3 being really heavy.
However, my DD 12 has just had her third ever period and has been bleeding, relatively heavily, for 13 days non-stop.
Should I take her to the doctor (assuming I can get an appointment) or do you think it is within the realms of 'normal'?