I'm not sure, but almost positive, that Lexapro and the other AD's in it's class, take awhile to start to work, about 2-4weeks, so I do not think they would just stop that soon. It may be all that is happening in your life right now. If you have been or think you were having ill effects of Lexapro for the past 3 weeks or more, you definately need to contact your doctor, just stopping a med. without letting the doc know, is really not a good idea, sometimes it can worsen things.
PLEASE contact the prescribing doc. about this, you have people that DO care about you. Let us know what happens, what he or she has to say.
Take care now,
DE