I would take your time getting back on your bike. But don't not get back on it. Don't let life hold you down like that. Youw ill be very aware of what is going on around you more now I am sure. Never under estamate a driver in a car. And it sounds like you got off fairly light compared to some accidents i have herd about. Not saying yours was not bad and on Christmas eve!
Take care! And should we be concerned about the black roses in your avatar photo?