when I had a hip problem it turned out to originate in my lower back. It was so odd, when the physio mobilised my back, the pain in my hip halved. She gave me stretches to do for the lower back and bum and this has helped. havent had much hip pain for ages - now my feet are playing up!
I felt like I set off too quick, but it felt niiiice cos all the other gals were motoring, then I kept going too fast (le puff le pant) till the last 1K when I started to doubt my sanity, and then the last 500m were pure will power to keep going at anything like a decent pace! It was madness! There was a gal in a rowing club tee shirt and we were together all the way round till the last 500 when I turned into steptoe senior, barfing up me lungs and she strided gazelle like over the finish line. Still, my running guru in the office (recently finished the london marathon with his eyes glued to Nell wats er faces bum) tells me if its an improvement on your personal best then its going in the right direction.