Dear Tracy,
 
Honey, I am so sorry to hear about the terrible experience your family went through.  My prayers and encouragement are with you along with the others who read about this.
 
I am an RN and I have some experience with post traumatic shock syndrome.  It wouldn't surprise me in the least to find that you and your family are grappling with this condition.  It's very real, and a normal reaction to the horrible experience you went through.  The nightmares and sleep problems are a symptom of this.
 
There is professional help available to you and I would like to encourage you to seek it.  At the very least, I would like to suggest to you to see your family doctor.  While you are trying to deal with the aftermath of this problem, he can help you with prescription medication to help you sleep and not have so many nightmares.  And I'm hoping he can point you in the right direction to have some counseling.  If he doesn't, then seek it out another way.
 
You will have enough to deal with and work out aside from the nightmares, but this is an area in which you can gain some relief now.  There are sleep medications now that are safe and non addicting.  So I hope that you and other members of your family will consider this so that you can get some relief from this anxiety during the night hours.  You will then be more refreshed to grapple with the anxiety of the daylight hours.
 
I so admire you for what you did.  May God bless and heal you and your family.