Is it normal for frontal hair to look like this? 24 (M)

[Nice]

Last month, I noticed that a few hairs seemed thinner on my front hairline than usual. I was told by a barber, gp, dermatologist and hair loss consultant I was fine, but this doesn't look normal to me. What do you all think? Am I overreacting? I want to catch this early so I can slow down the balding process. All my uncles on both sides are bald, but both my grandfathers kept their hair into old age. I'm meeting with the dermatologist again in two months.