I am having muscle weakness from childhood. What to do further?

Hi doctor,

I am 21 years old. I have muscle weakness in both arms and legs since childhood. I cannot climb stairs without support and I feel tired most of the day. I cannot stand for long and also cannot run or walk. My legs and feet always get numb. I have decreased sensory sensations in both feet. A few months back, I was diagnosed with hypothyroidism and vitiligo. I visited a doctor last month. My electromyography (EMG) and nerve conduction study shows symmetrical sensory motor demyelinating polyneuropathy with clinical diagnosis of chronic inflammatory demyelinating polyradiculoneuropathy (CIDP). Creatine phosphokinase (CPK) is 227 (reference range 24-195 U/L). I am on Prednisolone 45 mg, Levothyroxine 100 mcg and multivitamins for the past 17 days. Please guide me about my disease, prognosis and any rehabilitation that might help.