How old was it? It's probably food poisoning, something like salmonella. If the pain is too severe, go to the ER/call an ambulance and explain the situation. If you are in danger they will pump your stomach, if not you will likely get some pain relief and a place to stay while you puke up every meal you ate in the last 5 years (figuratively speaking.)

this is one of those see a doctor if it doesn't improve or starts getting worse things. I've seen a lot of people let food poisoning (if that's what this is) pass over them, but a doctor never hurts. just remember you're not gonna die or anything. your body should give you good feedback. it's time to rest and take it easy on your digestive system, and to keep in touch with your general physician.

People usually over exaggerate the dangers of eating old/spoiled food. At worst, you might vomit or have diarrhea, the abdominal pain will pass though

>>17358477
Hisbis why I specified if the pain was unbearable in my reply. It is perfectly normal tonhave a little pain/nausea, but if itbis too severe then it could A) be one ofbthe edge cases or B) be something else entirely.

If OP doesn't have persistent agony then lots of fluids and some painkillers, and try to sleep when you can.

>>17358456
Oh man. Well, brew up a tea with chamomile, spearmint and/or peppermint. You will probably puke it up, so drink more. Those things are specific to kill the bugs that give you food poisoning. If shit is really agonizing and/or gets worse, get to the ER