Meat allergy?

So a few weeks ago, I was just going for dinner at a local restaurant that I haven't been to for ages * I'm a Chegan (Cheating-Vegan) * so I decided to try a new dish on the menu, it's like beef with noodles. A few minutes later food & drinks arrive we start by praying before we dine, I try my delicious food and all seems well but like 30mins - 1 hour later I got gastrointestinal upsets for like the whole night, I told my parents that I need to leave early because I am in great pain. We arrive home I just ran as fast as I could to the toilet I locked my self in the toilet for a long time maybe less than an hour... guess what nothing came out not even those little crumbs of shit. I forced slept myself through the pain. When I woke up everything was as normal as it can get. I didn't bother on checking with a doctor because I'm lazy.

*I am able to eat chicken and seafood

*i am also unable to eat pork. Sucks I know right