I've been on Lexapro for awhile now for GAD and depression. I've been on 5, 10, 15, and now I am on 20mg. I found that 15 mg really helped for about 5 months, but then i decided to come off of it (STUPIDLY) and now my doctor has put me on 20 mg. Today is the beginning of week 3 on it. It has helped most of my physical anxiety symptoms. I'm still experiencing being tired all the time, and unusual dreams and I just feel like I'm not in control of my actions or thoughts, and I still obsess over little things. I can get it off my mind sometimes, but as of now that is the only thing bothering me. How long before I should possibly switch medications?