I'm curious what any of your lowest values were, where you managed to bring it back up and remain conscious.
I've woken up in the hospital a couple times in my life so had no idea what my value was for those times, but typically have managed to fix it myself, or have someone at hand to help me drink some OJ.
My personal lowest was 1.1 that I can remember.
My lowest has been 3.4 I would not allow it to go below that as damaging to health. Your body tells you when such is coming on and one should be able to respond accordingly. I also carry glucose tablets where ever I go for such a time.