Am I balding? (photo)

This may not be thinning. If a person with an average hair thickness was to bundle all of the hair (like a pony tail) on the head, it would make a circle about 1/2 inch thick. Now spread that out all over the scalp, and that is the coverage one gets. Short hair, a bright flash and straight hair can make a normal person look like this.  To find out if you are balding, a HAIRCHECK test will tell you that (see here: https://baldingblog.com/haircheck-test-how-it-is-done-video/)