Am in agony and care barely walk after a 4.5km run this evening. Started coming on after a 10km sponsored walk on Sunday then a fairly gentle 3.5 km run on Monday. It was hurting a bit on Tuesday so rested until today. When I say I run, it is a very gentle jog and an sure I am not over doing it, any tips on how to get over this awful pain ? It's like neck of femur as opposed to my pelvis.