you're not going to believe me, and i can't believe that i'm making this suggestion given what you wrote, because it seems so cheap. so much "wow thanks i'm cured"
but please at least try this. you have nothing to lose and it's free.
take a DEEP SLOW breath. all the way in. slowly. should be "one hippopotamus, two hippopotamus..." do it through your mouth.
hold it for a sec. however long you want.
then, let it go. do it through your nose or mouth or both. make it take just as long as it took you to inhale, but take some extra time if needed to make sure you got rid of all your air.
and then take a sec.
and then do it again.
you'll quickly be hit with an oxygen buzz, and it'll be your decision to keep breathing or just go to sleep.
edit - didn't realize where i was posting, and it's funny because i'm one, too. this is what i do. breathe in for 5 secs as much as you possibly can, hold it for a sec or two, then exhale completely. repeat. do this five or six times and you'll get a buzz. and it will make you want to sleep.