What Causes Muscle Weakness Along With Burning Sensation In The Lower Leg?

Is it MS or ALS? hi i have been having very strange symptoms for the past few months now. first is it start with muscle weakness felt it all over my body and then the burning sensation on my right lower leg start it for a few days it start just at night time same spot but after it start it to move different spots of my body, it went to my back and on my neck it burn it like crazy especial on my neck it last it for a few days same time i got sharp pain on my left hip and ankle on and off. i had a sharp pain on left side of my head for 3 days straight my eye lid twiced for 2 days. soon after my bones start it to crack everytime i move my joints crack i don t feel any pain when they crack but just turn my shoulders crack or my legs but now the middle of my back is hurting. and my speech has become slurry at times and I m become little clumsy and i feel that at time I m gone lose my balance. all the blood test turned out to be normal, the b12 was little bit on side but not under the normal range, waiting to see a specials soon, any idea what this can be? can this be MS or ALS? the wait its driving me crazy