Hi there,
I think going to see your M.D. is the right move. You should tell him/her everything, maybe even send this post to your doc ahead of time, just so you don't forget anything. clonazepram (which is an SSRI by the way) may be causing you problems including sleep problems. I'm really pretty sure that you shouldn't be taking large quantities of that or any drug based on how you are feeling on a particular day. You've got to be super-steady and have a plan with this kind of stuff. It sounds like you are also taking something for ADD and/or for narcolepsy and, if so, I'm sure it's possible that such meds may be causing you problems, especially if you take them erratically.
I really get the impression that you are in a stress spiral. Stress causes your brain to shut down which causes problems at work which causes more stress, and so on... While you wait for your Doc appointment, try to find some way, any way, to calm down.
You say you can't stay in the present moment, but this is really essential. Here are some ways to try.
Try a guided meditation
Listen to some Eckhart Tolle stuff on the web:
Just count your breaths until you get to 100.
Go for a walk.
Try "SNAP CLUB" as described here:
http://forums.psychcentral.com/depre...n-escaped.html
Give yourself a time to do this when you don't have anything to do and when you can drop your worries about your job.

- vital