Ok. I'm not sure what to say about psychotherapy because I have no experience with it. This weekend I re-read Steve O's book and learned so much the second time around . I think you will recover because you are proactive and are reading the material and are able to accept the diagnosis.
My own recovery has taken more than a year. I often times got discouraged because I was in pain despite having already accepted the diagnosis. It is easy to lose sight of the bigger picture when I'm in agonizing pain.
It's interesting that you mention walking as being the most difficult activity. Because for me, it was walking that was always the most pain free activity and sitting which caused most of my pain. This just further confirms the TMS diagnosis. Some of us get pain when we're walking, others get pain when we're sitting. The one thing we have in common is that we're unconsciously repressing disturbing thoughts, emotions, feelings, and impulses and our unconscious is using pain to distract us.
I'd recommend taking baby steps and just force yourself to walk for a certain amount of time every day. Reward yourself when you reach your goal. Don't get discouraged if there is a setback, recovery isn't usually smooth. My advice is also easier said than done. Us TMSers are already too hard on ourselves so don't be too hard on yourself.
Sorry for the off-topic post.