I had the same experience you describe. It was almost instant relief from the crushing feeling and negative self-thoughts, but I soon learned that even with meds you can still have bad days. It's the best med I've ever been on personally. Unfortunately, I am currently weaning off of the Celexa because it appears to be causing an allergic reaction in me. Not really sure what they'll put me on next and I'm skeptical, but move on I must.

Good luck to you, hope it continues to improve your situation.