He didnt mention anything about it being structural or acquired compensation, he assessed it by measuring from the my hip to my ankle, and no, I havent had any injurues or anything like you speak of.
I’ve taken onboard alot of the advice given here and looked at the links that numbertwo provided, thanks for those. I did a rehab session today following those guidelines, some sub max accelerations over about 15 - 20m. The good news is I felt no pain whatsoever while doing them 
definetely a difference from before, so I am starting to make progress! I guess the best thing I can do now is listen to my body and not push it too far while continuing the rehab