are you taking the ritalin as prescribed?
abuse can cause some of these things i think... going up and down too much...
also withdrawal when you run out can have crazy effects...

gotta becareful with that..

do you see a therapist?
i feel like a spectator alot myself but i have severe issues going on... probably stuck in a dissociative state..
talking with a therapist might be helpful for you to try to explore whats going on ..

becareful with the ritalin, too much is bad thing and too little can be bad too...

i've struggled with some vitamin deficiency too... but i dont eat much - i eat more now but i used to be really bad about eating...