First of all, I am so sorry you are going through all of this.  And secondly have you talked to your doctor about suddenly stopping taking Celexa?  I would definitely call and ask him all of your questions.  He is the one who can tell you how long these side effects will last. 

Here is the direct link to the Celexa website with information about the drug.

I have also found information which states that it takes up to four weeks for this drug to work and warnings that if you do stop suddenly there could be unpleasant side effects.  So again, please do talk to your doctor.  He might advise you taper off of it instead of stopping cold turkey. 

I also found a list of the potential side effects of taking this drug which may include the following:

Serious side effects:

• seizure (convulsions);

• tremors, shivering, muscle stiffness or twitching;

• problems with balance or coordination; or

• agitation, confusion, sweating, fast heartbeat.

Other less serious side effects are more likely to occur, such as:

• feeling nervous, restless, or unable to sit still;

• drowsiness, dizziness, trouble concentrating;

• sleep problems (insomnia);

• nausea, gas, upset stomach, loss of appetite;

• weight changes;

• urinating more than usual;

• decreased sex drive, impotence, or difficulty having an orgasm; or

• dry or watery mouth, yawning, or ringing in your ears.

I hope you feel better soon.  Perhaps someone in the community can chime in with their personal experience with taking this drug.