I took Celexa for about 6 months four years ago. The middle dose worked well, I think, but things got bad once I was taking the maximum dose. I wasn't acting right and I felt upset and paranoid. I told the doctor that I didn't want to take it anymore. I told him what was going on with me and he insisted that I keep taking it. So I threw the meds away and never went back to see him. I was pissed because I didn't think he was listening to me.
Now that I know better, if something isn't working for you, see if you can take a lower dose until you're weaned off. Maybe you could try something else?