I spent almost the first 3 decades of my life in constant fear and dread of Armagedon. It put a cloud over everything I did. The constant thought of "God is coming, and will kill me if I haven't done enough meetings and service" literally drove me insane (I wound up in a psych ward a year ago). I had been on anti-anxiety and anti-depressants for many years. They helped a little, but at their best they mildly dulled the fear while making me a walking zombie. I had constant thoughts of suicide, and 2 half-hearted attempts, figuring that I might as well end it now and hope that I somehow get resurrected.
Fast forward to now. It all started for me after I missed quite a few meetings while in the mental facility and shortly thereafter. I suppose that I had always had doubts, but never really bothered to look into them as I was fully convinced and consumed by "The Truth" of it all. Investigating one doubt led to another thing, and another thing until after many weeks of staying up til 4 in the morning doing research (using JW and non-JW materials) that I had finally come to the realization that this religion that had made me miserable for so many years was wrong about multiple issues, and very very cult-like.