My stomach feels like a bunch of knives are stabbing me i'm vomiting losing weight fatigue the pain has gotten worse in the last 2 days what is it?

Pain: It is best to go to the er to rule out the possibility of a bowel obstruction. Dont waste any time. The matter is urgent.

Very graphic : Your description is very graphic -- and it sounds like you really need a medical evaluation asap. You could have some type of gastritis, an ulcer, or other cause for your pain. Reliable diagnosis requires a personal visit with a doctor, rather than asking online physicians who cannot know your entire history or situation. You may need specialized GI diagnostic tests also. Be well.