1) If you were 18, you were an adult; your parents were not obligated to pay for your medical care or rehabilitation. Many would, of course, but legally, since you were an adult, they did not have to. Therefore, there is no claim against them.2) After 10 days, it is past an possible "statutes of limitation," or times within which you'd have to file a lawsuit, for any negligence or negligence related claim, so even if they'd had an obligation to pay, it would be too late to sue.