That would be my guess too. The anxiety/fear of dying and the whole I-feel-like-I-stopped-breathing thing get worse as the night progresses. However, my brain keeps telling me that it's not "just" anxiety but that there's something wrong with me and that I'm going to die. Right now I'm so anxious about it that I haven't taken my sleeping pills because that means I have to go to sleep, which might kill me (according to my brain).

I kind of feel like this might be caused by the Sertraline (I've been on them for 4 days). I don't know for sure though but I don't really recognise the way I feel. I don't really recognise this anxiety. I'm a very anxious person but this is different somehow.