I'm so sorry to hear that you've had this experience, I really do hope that you recover quickly and fully. It is quite sobering to hear these kinds of stories; I am fortunate enough to have only had one accident on a bicycle on a road in nearly 30 years..and that was as a teenager, and was entirely my own fault!
One thing that might be helpful; about 6 months ago I injured my leg, just above the knee, quite badly- I was chasing after my dog who was just about to run into the road, and ran into a small protruding bolt..the net result was that I ripped a hole in the muscle. I have a very high tolerance for pain, but it was agony. Months later, it still hadn't healed..if I rode a bicycle, I was hobbling around the next day. I was concerned that it might never heal (all the Docs could suggest was rest and various exercises)..and then a good friend of mine suggested that I buy an 'infra-red' lamp (I bought an angle-poise version, from amazon, as it was very convenient to use.) The first session..the injury site swelled up quite badly, my friend said 'that's a good sign'..just use it for less time next time. Long story short, a month later of mostly daily use, and my leg is about 90% healed. I have found that 20 minute sessions are perfect, no longer.
So, once the Docs have knitted you back together, to help/speed recovery..an infra-red lamp may be very helpful. I really do wish you all the very best in your recovery