If you’re concerned about Lexapro’s effects, I suggest you go see a psychiatrist
for a one-time drug consult. Although
Lexapro isn’t generally considered to affect sexual functioning, there have been some people who have reported sexual side effects. So go see an expert, and set your mind at ease.
From what you’ve written, it sounds like there’s nothing wrong with you. You’ve just convinced yourself there’s something amiss, and now you’ve created a viscous circle.