As strictly an opinion, and by no means any sort of legal type.....I think you should calculate the specific work time lost, and the specific amount that your bills come to. And simply that. And you'll be able to prove all that to the insurance company, with receipts, and calculations.
The reason I say this, is because that 17 year old did not intend to cause you pain and suffering. If he had, then it would be absolutely justified to attempt to be reimbursed for his actions. But if it was an accident, by definition, a situation that happens unintentionally. He may have been at fault, but I highly doubt he set out that day, to do damage to you.
So why would you, or anyone in your position, wish to intentionally do harm, by requiring more money from his insurance company? You asked what would be fair to ask for, and it doesn't seem fair to ask for more than what you're rightfully due.
And seeing as pain and suffering are completely subjective perceptions...to put a monetary value to them is almost ludicrous. You certainly wouldn't attempt to put a dollar value to how happy you are sometimes, would you? :)
I sincerely hope you get the funds you need to cover all your medical expenses, and sorry for the somewhat negative response.....