Quick question, do you have an orthotic to help match your leg length difference? If so do you wear it regularly? If not has it been previously suggested and rejected for any reasons? And do you know the amount of difference in your leg length? (measurement)
Sorry, only have a minute, will tackle your post properly tonight after work
Quick edit just to let you know I am not just pushing orthotics / selling orthotics etc. Read a bit too much like that for my liking, just a physio curious to see if this avenue has been tried and tested already.