I've been taking sertraline for 4.5 weeks now, after 12 years on clomipramine. I suffer from panic attacks and anxiety and in the past year or so the clomipramine has become less and less effective. Recently I have been waking up choking, coughing and unable to breathe. I have to try to force air into my lungs and eventually I can take a breath. The choking attacks have lessened and improved somewhat, and I am having better days, but still have some off days when I have to take a diazepam, cannot abide loud noises (ie my grandchildren lol) and worst of all I wake up every morning feeling quite depressed. It takes agood few hours to come out of this horrible 'down' feeling. Is this usual for sertraline? Or is it just me and this dark, depressing time of year?