Everyone has a different comfort level with carbs. Some people can go VLC, others need a higher level to feel right. It may take a bit to figure out what works for you.
As far as your hair thinning/falling out. I've primarily had it happen for two different reasons.
Periods of high stress. You definitely have had that going on.
Hormonal changes. My hair has always been so thick that I could be out in the rain all day and it would never reach my scalp. Approaching menopause with all of its hormonal crap my hair thinned out to where you could actually see my scalp.
Hopefully you can find your balance soon.
Of all the paths you take in life, make sure a few of them are dirt.