Hey guys Iv got a serious problem I'm 13 so I normally wouldn't care about it at all but I have MNSEC athletics wich is exactly like sports day and it's on Tuesday 21st march and it's now Wednesday the 15th march and I'm already 14 or so days late and I'm not on the pill or anything and I really don't wanna get my period from now to them I don't wanna have it on sports day is there anything I can do