I seem to be more the latter. I haven't really noticed anything that warns me when they are going to hit, but once they do, they will last anywhere from 3 days to 3 months.

Is it normal to have zero thoughts of suicide, and then within a couple of days, you can't think of anything else?

Sorry if I'm asking a bad or redundant question, I'm just trying to find more ways I can relate to people as I spiral down into lonely land...