What Causes Tiredness And Body Pain After A Fracture?

I have a burst fracture to my T11, approx. 11 weeks ago. Didn't know I broke it until a week after I did it (i was on vacation and was in pain, but thought i just jammed my back). I was in a tlso brace for almost 8 weeks. I could take it off at night to sleep and to shower. I am now having a very hard time weaning myself from the brace. The muscles in my back in shoulders around the fracture are strained and easily fatigued. Will this go away? I feel better in the brace, but need to get out of it. Is this achiness and overall pain and tiredness in my back due to relying on the brace for 8 weeks?