Hamburger and Fries

They were tasty last night
But hurt my stomach this morn  
I slept quite well excepting cramping,
And it seems a thing of late,
Or early this morning 
I thought of the gluten of fried potatoes,
And/or the bun, or maybe
The fat in beef of unknowable origin,
But mostly I thought not to do this again
Until I sufficiently forget.