The Lexapro will take a while to get revved up in your system and actually it can make you feel more anxious at first...I experienced this. However now when I take Lexapro it has a strong calming effect and generally keeps my anxiety very manageable. Good that you have a fast acting med for anxiety too...that will be helpful until Lexapro gets to its therapeutic levels.
As far as getting tired of faking it, i can see what you're saying with others. However, one thing I've learned is to be truthful to myself and say, "hey dude you have a nervous condition / overactive nerves so go easy." I find saying this (or similar) routinely helps...allows me to show compassion to myself.
Hang in there!