I think you're in a lot of pain and that's being expressed through your low weight and hair thinning. Eating disorders, like just about everything else, is on a spectrum. The signs of an eating disorder can be stronger in one person than another person. It doesn't mean that people with few signs of an eating disorder don't have an eating disorder at all. It means they have less intense symptoms but still deserving of attention, compassion and treatment. And they need the treatment or things will get worse.

Kudos to you for being reaching out and getting help in any way you can get it.