I started taking Lexapro for about 3 days at 5mg. Then I upped it to 10mg for a week. Now I have decided to up it to 15mg. I will eventually be at 20mg. How long did it take for this medication to help with anxiety? I am still finding that when I wake up in the morning I am extremely anxious and my heart is racing even before I am fully awake. Any input would be helpful.