So glad you had the strength to say 'stick it' otherwise it would have made you ill, good for you sticking up for yourself, there are too may bullies in position of power and it goes to their heads, it's a sign of weakness really, they make you look bad to make themsleves look good. My husband had a nevous breakdown some years ago, through the same kind of thing really, and was off work for a couple of years, but shortly after he left the job we heard that his tyrant of a boss had a heart attack, God is watching and knows what goes on, thankfully my husband is now fully recovered and running his own company, don't ever give up hope, have some time off and a rest and you will be ready to get back into work again.
God Bless, enjoy your life don't let others spoil it. :)