My personal opinion is that it's pretty rare for us to die from these. I've not yet found any statistics. It's based on experience and discussions with my endo, purely anecdotal. It's a question maybe people can ask their endo's and post responses here.
My body has saved me many times. Even when my wife 911's me, I still manage to pull out and greet the EM folks. She's learned not to call so quickly.
I would recommend not being too high or eating before bed if you don't have to. Feeding the disease is fundamentally wrong. Learn what your body does evernight. Start sampling different hours and build a profile of what your BGs tend to do. Even stay up all night and test every half hour. Knowing your overnight profile, you can make a much more informed judgement before going to bed and feel confident about what will happen. Not knowing is very stressful for all.
I had another nasty last night. I learned the hard way that some Christmas treats aren't as sweet as you'd suspect. I think the hostess at the party I was at cut out all sugar without telling me. Combine that with being agressive due to my recent lathergy ...

But even without my wife making me drink juice, I think I'd have pulled out ok.
p.s. If I remember correctly you are still a teenager. Your body is at the peak of responsiveness. You have few worries. When you get to your 30's, start paying more attention because your sensitivity will become much reduced. I was never 911'd in my teens or 20's. At age 34 it all started to go downhill.