In reply to Rog Wilko:
I did plenty of stretches also but just wasn't getting the stretch right, even with physios instructing me. I also started yoga, for two years, and I think understanding came from that about stretching and I was better able to use the stretches I already knew better. I played football and rugby for years and should have known this stuff and been able to stretch 'properly' but I didn't. Now, I tend to ignore what others call perfect form and can feel whether the stretch is doing what it needs to do but it's been a long path. The adductors are tight again at the moment after five weeks in the Swiss mountains, a price worth paying however.
If you think you might be overdoing the stretching, then I'd suggest it might be difficult for you to differentiate between good pain and bad pain - I hope that doesn't sound condescending. It's something I was guilty of for years and I can honestly say it's only been the last three years that I'm not causing myself any damage.
Best of luck with it all.