Ok so I am 15 and I haven't had my period for like 3 years but I check with the 5 doctors about it and there do blood work and still don't find anything and they even did a alter sound on me and still didn't find nothing but now all a sudden I think I am starting my period but it one day it light and one day nothing's on my pad and the next day something on it and I just worried but now I don't know how long it should last.
I understand you . Im having the same problem, haven't had my period for almost 2 years. I just want to know how are you, is your period back? and if it did then what did u do. Hope you are getting better.