You titled this post "I fasted too long" and your first sentence was "I lost hair".
If you began refeeding as soon as hunger returned, then you didn't fast too long.
I think it's well established that hair loss can occur during a long fast, but you seem to link the idea that you fasted too long with hair loss even though it sounds if you began refeeding at the correct time and the hair loss was a byproduct of normal healing.
Anyways, if the hair comes back better than before, maybe you can redact this post.