Diffuse thinning or fine hair?

[Pitfan5647]

Title says it all. Short back story. Dad and grandpa both went bald early 20s. I'm currently 25. Grandpa on mom's side didn't show loss till 60. Just trying to figure out if I'm thinning or just thin hair. I never find hair in the shower. Never on my pillows. When I comb it maybe a few strands come out but nothing alarming. Looking back on older pictures from 20-now it looks similar. However what drives me insane is when my hairs wet and or sweating I can see down to my scalp. I've never had anyone tell me my hair looks thin

1st Pic on the left is completely dry. Next two are wet hair. As you can see even the back of my head where the hairs aren't dht sensitive clump together and you can down to my scalp