My dd is 13 almost 14 and hasn’t started her periods yet - I know this is normal but for the last year she has been having moodiness & stomach cramps every month (in a regular cycle - I’ve been tracking it). I don’t remember getting cramps before I started only afterwards. Is this body getting ready for period stuff or something I should check with gp about. I’m a bit crap at all this as with my Mum it was very taboo and all hush hush - I’m trying to do the opposite and be all open about it but am realising how little I know 
even after having periods for over 30 yrs.