You might want to look into counseling to deal with the emotional effects of the collision. And those costs should also be covered by the driver's insurance.

As for the rest of it, I recently was involved in a 3-car collision and had problems getting cooperation from the insurance company of the driver who caused the crash. Some of those problems were because both of the other drivers were trying to avoid responsibility by not returning phone calls. I found my own insurance company to be extremely helpful in dealing with all if it -- advising me on what I should do and what I could expect, as well as calling the other company at one point when I couldn't get past voicemail. At one point they told me that after a certain amount of time they will go ahead without any statement from the driver. Hopefully your insurance company can provide similar support to you.

One thing to note is that you do not want to accept any money from them until you are sure that you are completely 100% healed -- once you cash their check, they will consider it final and you will have no recourse if any injuries require additional treatment.

Dealing with the aftereffects is truly a frustrating process. I hope you're able to get through it without too much difficulty.