Horrible hip pain in cowgirl??

Liv
Okay so I really can only hit climax in cowgirl. When I do I can pretty much climax over & over.
But I get this horrible hip pain (both hips) & it brings me nearly to tears.
Does anyone else experience that?
Side note:
I've been an avid runner for 4 years now. 10-12 miles 5 days a week. I'm sure that's taken its toll on my hips, but I never had pain until wet rates doing cowgirl.