Hi Tony,
Paul is correct, someone as young as yourself, it is unlikely but not impossible to be ALS. Have you had an electromyogram (EMG) test performed? If not, have your neurologist perform this test. It is a painful test and to be blunt, it hurts like Hell. Here's a link that outlines what an EMG test is.
http://en.wikipedia.org/wiki/Electromyography
Best of luck,
Jeff