It's always better to let it out than keep it in. Sometimes I have intrusive suicidal thoughts as a result of the anxiety and depression that I had even before events happened to give me PTSD. When I have these, I immediately call a close friend and tell my spouse, and make sure I am not alone for the next couple of days. I remind myself of the things in my life that I do enjoy, and the goals that I have, and I think about those who would be hurt if something were to happen to me. I think of people who have survived worse, like Holocaust survivors, and realize that if they those people can carry on, I can too. I try to recognize it for what it is--a relief from anxiety and depression that I want, not my life to end. If they keep up for more than a few days, then I call my doc and therapist and make sure I go in ASAP. Luckily, these episodes are few and far between.