The worst physical pain i've ever felt has got to be getting hit in the head by a line drive in baseball. It dropped me to my knees and i had a lump on my head. Everyone on the team and even the athletic trainer was amazed i didn't got knocked out cold because it hit square in the forehead. But i got over it pretty quick and took batting practice like 5 mins later.
The worst emotional pain i've ever felt is knowing of a decision i'm eventaully going to have make, but i know in my heart i don't want to, but its inevitable.