I was on 10 mg of Lexapro for six weeks with no improvement in depression or anxiety. My doctor up my dosage to 20 mg 3 1/2 weeks ago. I'm still no better. In fact it seems like the anxiety got worse as soon as he upped the dose. Is this a side effect of higher dosages? How much longer should I give the Lexapro to work before I ask to try something different? Thank you for your thoughts.