Hi I am 14 and I haven't gotten my period yet. I am continuously getting really sharp pains under my belly button. When I try to stand up straight it hurts terribly. The only thing is I have no other signs for my period. And I have also had these pains before but tonight they hurt pretty bad. If someone could help me figure out what possibly is going on that would be great. The pains do go away so I am just curious as to what they are.