Hows your short term memory as Lexapro can cause forgetfull ness.
I had a similar experience with Celexa, which is a very similar drug (celexa is citalopram, lexapro is escitalopram). I also had low blood pressure (78/58 at one point), and worsening depression, which really wasn't helpful since that's what I was taking it for. I was only on it for 4 weeks though...