What happens if i miss 2 days of citlopram?

Maybe nothing: Many people who miss doses of Celexa (citalopram) may experience mild withdrawal symptoms. They may even describe "shock-like" symptoms, dizziness, or other unpleasant effects. The best treatment for these is to restart the medication as soon as possible. If you are intending to stop celexa, (citalopram) do it by gradually tapering off the medication over a period of weeks. Sudden stopping may cause undesireable effects.

Celexa (citalopram): Dizziness, lightheadedness, restlessness, insomnia, stomach upset.