Document the damage. That includes you AND the bike. If you've got visible bruises or cuts, take pics! Save the shorts until the insurance company wants to see them. Obviously have copies of the doc's report once you're checked out more thoroughly.

It's not the speed that makes drivers not see you, and your height is neither a help nor a hindrance. You're just not a car. If drivers aren't looking for you, they won't see you no matter what.