Help Ladies!

Cecilia

I am 15 days late on my period, though what scares me the most is this lower abdominal pain I have been feeling for the past 2 weeks and the pain comes on my when I am moving fast if I am walking fast. I have to take my time on everything. what can this be? I have to sit carefully aswell. and at times I have to stop and take a deep breath and walk slowly if I don't, it starts to semi cramp.