I do experience this! I knew my panic could be brought on by skipping or going too long between meals. I have a diabetic friend, and she wondered if some of this was my problem. I even brought this to my doctor's attention and he stated I shouldn't be burning through that much sugar to cause panic, when I told him, if I get nervy feeling, the whole breathing is off, I drink orange juice and feel better in about 20 minutes. I even went so far as to buy a glucose meter and checked my levels (determined to prove my doctor wrong), my blood sugar was on the low end-but normal range when I experience these episodes. So yes I wonder if our sugar levels -even with normal ranges are too low for us? Regardless if it's in my head or not, I still keep OJ here for these reasons. Appointment with him is due soon, going to ask for the whole fasting/glucose check.