I've been on 20mg of citalopram since January after a bad few months. I've been feeling great, with just a few grotty days which I guess is to be expected, but over the past 2 weeks the grotty days have been more consistent, and on Saturday, for the first time in about 11 months I had a bit of a spoon out and I'm feeling pretty pants today after a rubbish night of waking up and odd thoughts. What would have caused this sudden relapse like that? Fortunately I need to get to my doctors this week to get a new prescription, but just wanted to see if this is a common occurrence, I'm really new to all this. Thanks for your time.