Don't worry, these twitches are all par for the course with BFS.
I have them absolutely everywhere. woke up this morning with a twitching throat! not the best way to start a new year. However, I have made a New Year's resolution that i am not going to waste any more time on my anxiety issues
Urinary problems do not figure with als and twitching does not figure with ms. both, however, can be present with a generalised neuropathic condition.
Steve, who contributes regularly, has a website dedicated to peripheral nerve hyper-exciteability (PNH) If you look through it, i'm sure you will identify with it. I felt so much better after I had checked it out because before, i felt all my symptoms could only lead to one diagnosis. here is the address
Mate, you're 24, in the UK there is no-one in your age group diagnosed with the disease you are freaking about in the last five years (I can post you the statistical data if you want, that's how much of a sad, geeky nerd I am

)
Make a deal with yourself not to allow fear and anxiety rule your life. You only have the one and it would be such a shame to waste time on worrying about an illlness you do not have
Happy 2006, God bless, Julia