I'm so sorry you have such a d*** for a boss. Definitely you need out of there and tho starting somewhere else is stressful this is so much worse what it's doing to you.
And yes I feel blah on Tuesdays because I have a class I absolutely HATE and its almost an hour drive and blah blah. (semesters almost over tho so in that way its much easier situation) But yeah stress, anxiety and an outright dislike of the environment in which you are going can definitely make you feel like poo.
Good luck in your job search, I hope you fins something else real soon!
\"As soon as you trust yourself,you will know how to live.\"
Johann Wolfgang von Goethe
\"Do not anticipate trouble, or worry about what may never happen. Keep in the sunlight.\"
Benjamin Franklin