I've had 2 concussion and now suffering PCS.

Today, my grandmother came to visit me, and as a joke gave me a little slap to the cheek (not exactly a joke, but it wasn't out of anger and she was just kidding with me).

Does that count as a third concussion? I didn't feel my head shake, but that's a little slap (and any blow to the head can cause a concussion).

This wasn't one of these slaps that turn your head to the side - it was a mild slap that didn't even hurt, but I still fear this might cause a concussion (because it's still a blow to the face).

So what do you think? Did I get a concussion from this? I'm really worried...