I hate to be that guy, but talk to an attorney. It sounds like some people made some mistakes that either lead to your accident or exacerbated your injuries. It sounds negligent to let someone ride home in your condition. Although you may have insisted and don't remember. Either way, cover your bases and at least talk to someone. You don't want to have medical bills down the road due to someone else's actions or lack thereof.
Glad to hear you're relatively OK and I hope to be riding as long as you have.