Well good luck with the fitting yet honestly I'm not sure it will work. The problem with a pro fitting is that these guys are usually fitting people with the idea of getting more power for them and I don't believe that this is what you need right now. My view is that you need to back off from the idea of power and speed, bias your position towards comfort, and painstakingly work at balancing your legs. This will mean backing off with the leading leg, soft pedalling for a while and working on developing the weaker leg.
You won't get there trying to go full tilt everywhere.