I have to do an exam for my labyrinthitis this Friday, so i can't be on any meds. Just yesterday i realized I was very anxious and eating too much. Today was the same, now i feel very guilty about eating too much, not being in class and not talking to my friends. I was feeling very good about eating and missing class today but all of the sudden i feel horrible.

How many days do I have to miss my lithium so i become unstable?
Could this be cuz im missing my meds?