I don't take Lexapro, but I wake up like that when my anxiety is high. I hate it from the moment I
open my eyes it's there fast and hard. It really sucks on one hand I like to sleep because its one of the only times I feel truly normal but I hate waking up like that. I'm sure it will pass mine always does and then before I know it I'm waking up going hey I feel ok this morning. Hang in there I'm sure you will feel better soon. I will keep you in my prayers.
"Happiness is your nature. It is not wrong to desire it, what is wrong is seeking it outside when it is inside." -Ramana Maharishi
"Mind is the source of happiness or unhappiness".-Buddha