21 years old. Is this hair loss? If so, what next?

[suitandtie123]

As the title says, I am 21 years old and I am so afraid that I might be thinning at the top. A little background on my genealogy my mother's father never went bald but was thinning on the back during his later years. My uncles from my mother's side were never bald, but began to thin later in their years. My father, however, is almost completely bald. My father's father is also completely bald.

I have a unique two crown whirl and it has been a pain when styling so I generally stay off the hair products but I've realized feeling a little thin the past 18 months. Here are a series of photos from my last buzz cut to where it is now (a span of about...7 months?)

Thank you to anyone with valuable advice and very grateful for you taking your time and advising me.