Thanks for the reply, Shannon.
Apparently, it is not alpha-gal. I just had a blood allergy test and the only thing it showed was a "mild shellfish allergy". *facepalm*
And, yes, it was very sudden. Here I am, cruising along and prepping an Italian style stuffed pork loin to go into the slow cooker. Fast forward through a few hours of smelling and drooling over the pesto-stuffing goodness, and cutting into the beautifully twined meat. About halfway through the meal, sudden agonizing, searing, doubling over to shield your stomach from invisible knives pain.
Okay, maybe it was