How do you know when pork is done?

Just pan fried some breaded pork chops for about 3–4 mins a side. I cut it in the middle and see no red. Some parts of the meat (where I cut) look “glossy” and some white. I ate one of them and it didn’t taste bad. Are they undercooked?

The thought of undercooked meat disgusts me. I’de rather have my meat tough as shoe leather than undercoooked.