Glad you are talking to the doctor. That will be one less thing to be anxious about. I do take lexapro, but never had that as a side effect (I did though have that side effect with Paxil . . . where my muscles would be tense . . but it was more an all-over feeling and especially in my arms and hands).
I like to start on a half dose for a couple days just to allow my body a chance to adjust. If I switch meds, I go off gradually and then grandually go on the next med (but you can't do that with time-released pills because your not supposed to break them).
I think if it is a side effect of lexapro, it will diminish in a few days. Let us know what the doc says.
In His Grip,
UCTD (Undifferentiated Connective Tissue Disease), Hashimoto's, High BP, GI Inflamation, Diverticuloses
Plaquenil, RX Motrin, Lexapro, Amitriptylene, Salagen, Lotrel