Hey Leno,
I went through this exact same thing with the upping of my Celexa (which is really similar to Lexapro). To be honest, feeling good freaked me out and I had a panic attack
. However, the extra... buzz?... of energy seemed to fade away as my body adjusted, by the good mood and positive feelings have stayed.
I don't know if that was any help.
Hope you have a peaceful and happy evening.