Why do I have sudden left-side stomach pain after junk food and caffeine?

I ate a hostess cupcake and half a celcious Drink then sweet potatoes fries from my new job where they serve food. I began getting on and off severe pain left side of stomach like cramp on pancreas. Why? I can’t go to doctor as I don’t want be fired from new job and start in 2 hours. I drank half of Tylenol then stop as I heard it’s not good take with celcious.
what I do? can I take pepto or is it dangerous? I been told in past by doctors I need limit junk food and caffeine intake

Why do I have sudden left-side stomach pain after junk food and caffeine?
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