Have just been to see my GP with sore hip. He pulled, pushed, twisted and prodded and informed me...
1) It is definitely not a stress fracture.
2) It is in the wrong place to be bursitis.
3) He would advise rest in an ideal world, but as I don't want to, he would advise running and painkillers because he's confident that I won't do any more damage by running on it and it'll probably go away anyway.
4) He thinks it is my bum muscle, not any sort of scary joint thing.
I am really chuffed.