Hi,
I can't urge you enough to reconsider getting off Lantus, you seem to have tried everything else. You said you came off it for a week and didn't notice an improvement- it takes people longer than a week to be rid of all the side-effects Lantus causes.
When I first met up with another forum member 'lantus survivor' ,last year, she could only walk very slowly. She had been, as you are, walking with use of sticks.
You need to get your life back, so it's got to be worth a try hasn't it?
Jus