When I was 16 my dad bought me a 1983 Mazda RX-7, which was awesome. It took me all of 2 weeks to t-bone another driver and total my car, his car and a third which he skidded into. It was by far the worst feeling I've ever experienced. For a few minutes I didn't know if I had killed anyone, but based on the condition of the cars, I thought that was a strong possibility. The car I hit was fucked, crunched in on both sides and mangled to hell. By some good fortune, no one was hurt beyond some cuts and bruises. Despite it being 14 years ago, I can't drive by that particular intersection without thinking about it.
Yesterday I felt guilty simply because I knew I was going to be waisting large chunks of the people I hit's time. Insurance claims, auto-repair shop estimates, rental car etc. I can't imagine how bad I'd feel if they were hurt at all. I'm sorry you had to go through that. Glad you were okay. The place where I got in my accident at 16 is near my grandparents house. I take the same exit each time I go there and I am always reminded of it. It will never leave me. It's amazing how quickly it all happens but also how long it seems to last while happening. Each revolution my car made seemed like forever or in slow motion.