18 years old and balding or thinning please let me know

[adzelg]

Hello I’m an 18 year old worried student that just realised something weird about my hair on the side, it looks like I’m balding or thinning but when I want to the pharmacy the woman said she sees nothing wrong and it’s just my hair is shorter and the fact it’s dark, my scalp seems more visible and my hair is in a parting