I'm only ten days into taking insulin, so my levels are both still a bit high and quite erratic. I'm experiencing hypo like warning symptoms at around 5.5 to 6.5, due I think to having been pretty high for quite a while. I know that's not hypo territory but it feels a bit like.
I'm running about 12 as an average at the moment but have been as high as 21 after food. We've just started adjusting my doses (8 of Lantus, 2,3,and 4 of Apidra daily).
I've not really tracked levels when hungry, so will do that, but I think it's generally when I'm high or when my levels are rising. I also think that when I get a bit shaky, I'm overdoing the eating to compensate. For whatever reason, I can sometimes go more than 4-5 hours without eating but often find I'm struggling a bit after about 3.5 hours.