When you stretch, what do you do exactly and how long do you hold a stretch for?
You say you cannot spirnt, does the pain stop you? (sorry I know this sounds like an odd question)
Is there any muscle wasting? like when you look in the mirror do both legs look the same at the back?
You also mentioned what the physio said to do but have you been doing them, if so how often?
This may sound like an interrogation but I'm just trying to gather info so that I can help !!!!