Nightmares SUCK

Dave, the kids, and I went to a small dealership to look at cars. While we were talking to the sales manager, his wife came in with their two small children asked Donovan and Zoey if they wanted to come play while we talked. So they went. (I still don't know why I let my kids go off with a complete stranger) A few minutes later, Van came running in crying. The wife followed saying he fell and should be fine. We left shortly after.
The next day, we noticed a baseball size bruise on the top of his head and another golf ball one on the right side; it was obvious his skull was fractured in those places. We all ran to the hospital- literally ran, but in more of a slow motion. We get there, ER registration is computer based and done with a handheld device that tries to make it more fun for patients by incorporating mini games. While I'm getting frustrated by being interrupted by pointless games, I noticed Van's face had become swollen. I take the device to the nurse's station and tell them I came here to get help, not play games and explain my son's condition and they immediately book an OR and take him. Hours later, someone comes out and tells me he'll be okay and that his injuries are consistent with abuse.
I piece together the wife having my son and his crying afterward and tell them to call the police.
The rest is blurry and I woke up soon after. I hate nightmares. I hate them when I see my son's fractured skull and his face swell until he's nearly unrecognizable. When I awoke, I couldn't stop thinking about it, and all I wanted was Donovan and to make sure he was okay.
When I finally fell back to sleep, my dream was revenge on the sales manager and his wife. I guess I just couldn't let it go. For fear of my insanity being revealed, I'll sum this one up with, "they died." They were both murdered, by David and myself. No one hurts my babies.
This nightmare, and its murderous spawn, has been stuck in my head for about 6 hours now. So if anyone does dream analysis, fill me in. As time progresses, I think, Why did I let that woman take my kids? And, Why didn't she hurt Zoey? Or did she? Why didn't I check Zoey all over after finding Van's injuries?
I REALLY hate nightmares, especially when they involve my kids.
Well then... I guess sleep won't come easy for a few days.