Hair thinning is also an early symptom of hair loss, right?

I am worried that my hair itself seems to have gotten thinner than before, rather than just the amount falling out.

When I dry my hair, I see a lot of short, thin hairs.
It is difficult to distinguish whether this is new hair growth or weak, broken hair.

It’s a bit ambiguous because my hair hasn’t thinned out drastically.

When I think of hair loss, I usually think of a lot of hair falling out first.
I saw that thinning hair can also be an early sign.

In that case, when there is no significant change in appearance as there is now
I am wondering if now is actually a good time to get tested.

Rather than needlessly changing this and that, starting with shampoo or supplements
I also think it might be better to accurately check the current status first.