This!
I have had serious medical conditions misdiagnosed by a GP - as have my wife and daughter. Even if you have to pay, do it. GPs are the lowest of the tree of medical professionals when it comes to diagnosis - go and see a proper consultant - they often catch what GPs have missed.
Thats utter bullocks Red. You and your family may have had poor treatment or what you perseveve as poor treatment but many hundreds of thousands get superb treatment from the GP/NHS route. Before you go off on one remember I'm talking for the actual experience of nursing folk and have shared the joy of successful treatment and helping families and loved ones cope/deal with the loss of people they loved.
If the OP is having trouble after a hike then I'd say pop into the nearest A&E unit, moan about the pain and at least they should take xrays which will be a good starting point for future treatment and possible referrals.