There are quite a few bike-type lawyers out there that could offer better advice to you than 'free bikeforums legal advice' - if you seek restitution, it would behoove you to engage someone who knows the processes, your rights, and so on. Not someone who 'has this friend who saw this tv once...'

be sure to see a doctor too, if you have not already. having someone scrub day-old roadrash with an iodine sponge is awesome. If little road bits are still embedded in your flesh, getting them all out would be a good thing. if they knee is swollen, have it looked at for sure.

if you go after the driver and are awarded a financial sum above the total cost of your bills, please use the first 50-75 for a helmet. I prefer to see who technology works than how the human body can fail.