Barbie. I have the exact same symptoms you have, all of them.
I'm prescribed to Concerta and Protonix and I don't get enough sleep.
To top it all off, I'm stressed due to school, college shit, and health problems.

I honestly think a combination of those things and the heavy use of cannabis just aren't working together. I'm considering stopping Concerta and taking a break from smoking, just to cancel out the possibility that it's a mental problem.
Over the last few months I've learned that anxiety and stress can cause or simulate health problems and really fuck with your head. Honestly, I wouldn't worry about it. It already seems to be improving for me.

Edit: Not to mention I recently quit smoking cigarettes, which may have something to do with it.