Sorry to hear about that - I'm sure you must be pretty shaken up.
As far as the JWs go, if you're an UBM and it wasn't your fault, then I personally don't think you'll see any action from elders or anything.
I personally know of an incident in the congregation here a couple of years ago of an elder in a serious collision on the way to the meeting with an oncoming foreign motorcyclist who was on the wrong side of the road. The elder is still the congregation secretary here and takes the Watchtower.
Something that is worth doing is getting yourself thoroughly checked out physically if you haven't already done so. The elder I mentioned did go to hospital and had what seemed like fairly superficial injuries at the time, but a couple of years down the line he now suffers with chronic back and knee pain and is unable to work.