If your iPhone still works, you are fine. Your iPhone would be in pieces if it hit your head with enough force to cause any damage. 60 to 90 Gs to cause a concussion. That is like dropping a 16 lb/7 kg bowling ball on your head from 1 ft/.3 Ms. That would be OUCH.

Your hospital is years behind the times. TV is fine as long as it is not overstimulating your brain.

This is anxiety. Your blood pressure likely spiked and now you need to get it back down.