I don't know if I can answer your question, but just wanted to add that I had a bad response to Lexapro that my psychiatrist thought was a mixed/hypomanic episode. However, I don't seem to fit the criteria without the medication. I am more inclined to think I had akathisia as another doctor mentioned. My diagnostic process has been confusing so I can relate to that. It's tough not being sure what is going on. I hope you can get some answers and feel better in terms of the low mood.