You might want to see your doctor and have them check your thyroid. I believe hair loss can be a symptom of thyroid problems, maybe other things.
A few years ago my hair was thinning very badly when I was working out 6 days a week. I went to my doctor for some other issues and he ran a metabolic panel. Turned out I was okay, the highlights I got to celebrate my weight loss were too harsh for my hair! I didn't think of it because I have dyed my hair for years and was having some other concerns.
If you are really concerned, check with your doctor. My mom says her hair changed texture as she aged, so maybe it is hormonal?