What Causes Lack Of Concentration, Dizziness, Dry Mouth And Eyes?

I ve been reducing my Lexapro over a 6 week period.I ve not had any in the last 13 days.I feel terrible,can t concentrate,woozy head, dry mouth & eyes ,pain & the worst-I can t stop crying! do I have to go back on the Lexapro or is this going to go away soon?