It happens every time! Chinese is usually the worst but I've just had pizza and my stomach's killing. Well, it's more in the pelvic area, where I get period pain, feels like my insides are being twisted and squeezed 
Is this an intolerance to something? Maybe the grease disagreeing with me? I don't think the food is off or anything, I'm not blaming the establishments, and I never get an upset stomach from it. Just get this pain for a couple of hours.
It's a bummer though, I love a good takeaway.