English “Bite the bullet”To do something emotionally or physically painful that you don’t want to do.

It comes from back in pre-anesthesia era when patients would bite on a bullet to cope during a painful surgical procedure. But now that I check Wikipedia for the phrase, they say it might have derived from a British term called “bite the cartridge”. They also mention “chew a bullet”. Am I the only one who has a dark feeling about the possibility of this idiom referring to suicide? Or do I need more vitamin D?