Panda,
we're all 107... it's a sympathetic glitch designed by the programme to equalize us!! Hey, I'm almost 60 myself. And, yes, you've already changed it by writing this post below.
The Citalopram is an SSRI in the Prozac Paxil family and therefore it should even out the highs and lows of your mood and let you function much better than you did before you started taking it. It can take up to 6 weeks to kick in so good luck with it and let us know how it works out for you - I hope the dizziness will cease and that you will feel the motivation of a lessened depressive state to step up into the CBT programme with vigour....