When I use to get like that I'd change the subject. I'd literally go find something else to focus on. When I was most in danger of committing suicide (had plan), I called the dentist and made an appointment for my 6 month checkup. And, you know how you can't commit suicide if you're supposed to be at the dentist next week, that would be rude!

What you do right now is decide you're bored with the struggle and go to the closest convenience store and buy a pack of gum. While you're out, you'll notice the idiot teen on the small bike doing stunts and "playing" too near a major road, making it hard for the drivers and wonder why his parents have no clue where he's at/what he's doing and remember back in earlier days when one knew one's neighbors and the neighbor kid's mothers didn't think twice before disciplining you. Why Susie Heinsheimer use to always have a runny nose and my stepmother would put kleenex up to it and tell her to "blow" and that was when we were seven and often Susie'd gnaw on the end of her braids and my stepmother would tell her to get the hair out of her mouth or she'd cut it off. My high school vice principal in Southern California did that! The surfers (early 1960's) would have hair "too long" so he'd call them into his office and cut it! There was a high, twelve foot gate too, between the school and the community and the boys would scale it to get out, make it a game to not be caught by him (lots of other, "normal" ways out) like playing "Berlin Wall".

Go out and "see"/experience something different from the inside of your own head! Let your head go with it and eventually it will wander to a subject you enjoy or something you'd like to try or someone who it might help to talk to, etc.