When I was first diagnosed, as a Type 2, I was 349. I had no idea what a true low would feel like. My Endo said, that as I came down and into a better range, I would feel low, but not actually be low and to test. The very first time I felt like passing out, because I was "low," I was 152. Now, that isn't low for most of us, but after spending an unknown amount of time in the 2-300's all the time, I was low. It felt like a low. Now, when I feel low, I'm usually under 100. It's been a slow process and it will continue until my body is used to where I should be numbers-wise.