Ok I hadn't had my period for almost 2 months now. I'm sure I'm not pregnant because I don't have sex. Does anyone know the reason for this? I'm 19 if that helps, could it be that my body is changing and what do you suggest I do?

Have you been doing any excessive exercising or doing any over the top dieting? Those two things can cause problems.

When was the last time you had a gynecological check up? It its not diet or exercise it could also be fibroids or cysts causing issues. I would definitely give a call over to your ob/gyn for a full check up to make sure its nothing serious (which I hope it isn't)