I have anxiety as a symptom of hypo. Since Aug. I have been on a strict diet and a lot of my symptoms are gone or lessened. I was also diagnosed with Candida which can cause hypoglycemia as well. I have had bouts with anxiety that last a week at time and then go away.
At one point I was having panic attacks so often and feeling so hungry that eating every two hours - on Stans's diet - was the only thing that relieved me. Before all this happened to me, I never had anxiety/depression before. I think part of the anxiety is your brain/body is desperately trying to get used to eating a new way. With Candida, you are fighting yeasties who make you crave sugar to feed them. It messes with your brain - big time.
Part is also the sheer stress of feeling so crappy and tense about following a strict plan that throws your adrenals out of whack. Even now - I still cannot pinpoint what triggers my anxiety. I just think it is my body healing and releasing so many toxins that it is hard to cope. I am doing a lot to detox my body at the moment too.
For many, the diet does take care of the anxiety problem but for me I seem to have a few more problems ( heavy metal issues, congested liver). My diet plan is supposed to address all of these things but it is a load to deal with and 'die off' can be severe.
I kept track of all I ate for months and it drove me crazy. I could not tell anything by it. But if you start eating the same things and then introduce just one item back in at a time, you are supposed to be able to tell if you are reacting to that. I've tried it all - glucose meter, several doctors, shrink, meditation etc. One doctor refused to treat me unless I did a 5 hour GTT. I refused because I was so sick at the time plus I knew I had hypo. Another doctor - a top endo - told me he did not believe in GTT. Get some books - 'Hypoglycemia for dummies' is actually a good book to start with.
Try Stan's diet posted on this forum and read past posts.