It is very unlikely that you have this genetic disorder as it is extremely rare. It is more common in women than men and symptoms are much more severe in women. If you have this you would be so weak you could not walk, move, and it would be hard to even talk. Your limbs would feel extremely heavy as well. There may be some muscle cramping and spasms. If you have had this a long time there would be severe muscle atrophy and weakness throughout the whole body.