Its been 4 months since the rehab protocol ended. Everything has been fine, no flare-ups and training is what it was before. Believe me when I say that it is totally worth it to shut down running for 3 to 6 months (depends on how severe) in order to do the rehab protocol. Being able to train again without this pain is such a great feeling. I continue doing the eccentric hamstring exercises along with a core stabilization program every other day. I know from lurking these forums for a while that ST people think strengthing is worthless, but it's been the key to staying injury free.
And yes the PRP is a hit or miss. I believe (Again I am not a doctor) that the PRP should only be used after 1 to 3 months of the rehab / eccentrics.
Totally agree with you, I went to EIGHT different doctors. I actually diagnosed myself before even finding Dr. Garten. I had people tell me that I had a disc problem (MRI negative) then they said it was my pirifomis or nerve entrapment, then a labral tear (MRArthrogram negative). That article I linked by Michael Fredericson was the exact article that helped me figure this injury out on my own.
Again any other questions feel free to ask.