Anxiety could be from long term no starch. I believe long term a low carb diet increases cortisol hormone levels keeping you high anxiety and restless sleep. It certainly did for me until recently I added back in some resistant starch into my diet (e.g. unmodified potato starch powder, green bananas, and potatoes that have been cooked and then cooled for 24 hours before eating). Its early days for this experiment, but after 2 years of no starch, adding back in some resistant starch in the last 3 weeks.....I've never slept better. Look into resistant starch. Some of us are experimenting with it. No guarantee's though. Its just something you have to try for yourself but so far its making a huge difference for me.

http://coolinginflammation.blogspot.com/2014/02/resistant-starch-panacea-but-why.html

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Diagnosed AS year 2000 age 26; First onset of major symptoms came with severe food poisoning leaving me in chronic pain hardly able to walk/sleep/sit - never been the same since; HLA-B27 positive; bouts of iritis; no biologics ever, controlling with NSAID's and diet but trying to get off NSAID's through various "biohacking" experimentations; Live in Auckland, New Zealand