Ah, I was close! Actually, you know what works well? Banana milkshakes sweetened with honey. Basically, the banana helps calm your stomach, and with the honey, builds up depleted blood sugar levels. The milk soothes your stomach and rehydrates your system and blah blah blah blah more science shit here, whatever...
tl;dr Banana milkshakes. You're not allergic to banana, are you?