Yesterday, I was mining and accidentally hit a pigmen.

I didn't worry too much so I just ran away to get away from the pigmen agroing me. But they didn't stop! I spent about an hour running away from them, they never stopped. Unfortunately, I died literally right before I entered the nether portal. When I came back, they were still agroing me, and died again. Later, my friends on their server(this all happenes on this server) came to the nether and ran around everywhere they could for about 40 minutes. The pigmen seem to never stop agroing. Even after we tried all the tricks