A.M.
I tapered off of Lexapro after taking it for a year for PPD. I had dizziness and nausea for about a week, even after following my doctor's instructions for tapering off. When I talked to him about the symptoms, he told that some people are just prone to having the withdrawal symptoms anyways.
I also took Lexapro for a year after the birth of my 2nd child. I tapered off the exact same way and didn't have any side affects this time!
Good luck. I hope you get to feeling well soon.