I'm 18 years old and male. I have not received any diagnosis for my condition.

Please watch a short video I made of my fasciculations. The video description has detailed information about my problem and history.
http://youtube.com/watch?v=P_Cal3zqBKM

I would GREATLY appreciate if anybody with medical expertise could provide any insight as to A) Why this might be occurring, B) What tests can be done to better assess my condition, and C) How can these symptoms be stopped?

I am currently taking Nortriptyline at night, but that has not provided any help.

Thank you so much