I am having pains in my arms and legs, sometimes numbness in my hands. I am a 28 year old male and I've had this problem going on about 2 years now, and it seems to be getting worse. I was tested for myotonic dystrophy, and that was negative. I feel like something is wrong though. I am constantly tired, thirsty, and with in the past 5 or 6 months constipation has been a problem. What do you think?

Optional Information:
Male , Age: 28

Already Tried:
muscle biopsy