Cramping at 15.5 weeks

Laura • 4 miscarriages, one living child, pregnant again.

I have been experiencing very sharp one sided cramps that do not seem to go away with change in position. I had increased urination earlier but it seems to have calmed down. At what point should I call my Dr? Could this be a something? Something like what? This cramping sucks! Hoping it is normal. But it feels scary.