I was recently at fault in an auto accident and am underinsured. I don't know what to do. I need help.

If this was a recent accident, how would you even know what the damages are to the other vehicle, or if the persons were injured in the accident? Was it a very serious accident? Did it result in any fatalities? How did the accident happen? Do you know if the occupants in the other car were injured? What about the occupants, if any, in your car? What is the amount of your civerage per occurrence/per person?