Posted: 19/06/2015 at 08:25
Well, I can say something but my case is not exactly the same. I fractured the neck of the femur 20 years ago at age 38 like you say, but by mountain-biking on packed-snow roads. I fell on the same side twice and the second day it went. I had one screw which is still there.
I never get a stabbing pain like you say, but it was a few years before all the pain went, e.g. when standing on one leg putting my socks on I wonder if somehow it has cracked again - fine cracks are not easy to spot on an x-ray. Or maybe a pin has moved somehow? You didn't say whether the pins were later removed. At certain leg angles I used to have a problem of the muscle hopping over one side or the other of the protruding pin but it didn't cause a stabbing pain (just discomfort and a yuk response )
I don't do much or any weight training with legs, preferring kettlebells and core work, but I wonder if this has put extra load and affected something. You're a bit non-specific about what A&E did, but I would go back to a practitioner and get another opinion.
Another possibility is that some damage was done to the head of the femur which can cause some necrosis and pain towards extreme or certain angles. All in all, I would seek advice in a regular appointment system, because there definitely seems to be something going on.
edit: not bragging or anything but I should add that a few years after that I converted to running and have done over thirty marathons and a lot of other races, so it is entirely possible to get back to 100% form for running. It would depend on the eact particulars of your case, but it is too early to get despondent!