Blue pork?

I had some leftover raw pork from cooking on Saturday. I kept it in the fridge and took it out today to use it in some stir fry. I was disturbed to find that a corner of it was blue. It was a darkish royal navy blue color. I sniffed, and it smelled like stinky Chinese calligraphy ink. I should have tossed the entire thing, but I stupidly just cut away the blue part, washed the remaining lump of meat and tried to cook with it.

After I sat down to eat and bit into my first bite of stir fried meat, I could still taste the calligraphy ink smell. Again, I stupidly ate two more pieces to confirm that it really was bad. After the third piece, I finally determined that it really was bad and even cooking the meat in high heat didn't make it edible. I tossed the remaining meat into the trash, and now when I open the trash can, it still smells like stinky ink. I'm sitting here slightly nervous about self-induced food poisoning, and wondering if it's my imagination or whether my stomach is feeling a little queasy.

Lesson learned: cook all my meat the day I buy it. Meat in China doesn't refrigerate well like in the U.S. And try not to cook pork. I'll stick with the little chickens instead.