I am exactly the same. I am thinking I have been overthinking (ironic), and now I have to do it very, very soon. I am now considering if finishing some letters, book a room in a hotel and hang myself (I already have the rope) tonight or procrastinating again and leaving it for Sunday. This would give me time for rehearsing with nitrogen and all the equipment that I had initially bought, but now I think... why? I mean, if hanging is effective, I should go and do it now I suppose. I have spent much time researching nitrogen and the exit bag, as it sounded fantastic and very reliable, and all that research has made me think it is a difficult method. I mean, it is good since I have gained necessary knowledge, but sometimes ignorance make you be more practical I suppose. Now I know ways in which it can go wrong and I am very afraid of failing. I don't want to try, I just want to have it done on first attempt. When I hear or read about suicides now I try to consider if all those people were also searching and discussing for a long time or just did it and succeeded... Also, there is a difference between impulsive and rational suicide I suppose, and I am being very rational, but a little of impulsiveness would help...