I have a sharp pain on my left side. Cramping. Can't breathe deeply and hurts to stand up straight. I just ate sushi and it started after that.?

Gastroenteritis. Could be that there was some bacteria in that sushi that has now made you sick. This may last a few days, and you could get some nausea, vomiting and diarrhea.
?Anisakiasis or... It may be simple food poisoning, but anisakiasis is the principal "worm" infestation of stomach, caused by ingesting anisakis larvae in raw or undercooked fish. Within a few hours there is severe upper abdominal pain, nausea, vomiting (relieved after endoscopic removal of worm). Anti-worm medication is available. Also possible, that require immediate attention--gallstones, ulcer, pancreatitis.