Where am I on the scale and should I consider finasteride?

[Kclennings]

I'm 19 with what looks to be a receding hairline.. I'm not sure whether it's male pattern baldness kick starting and it's really starting to concern me! My hairline has been on the move for the past year and has receded asymmetrically. It seems to be catching up now but my right temple has notably more recession.

No males in my family have male pattern baldness aside my grandma'a brother (great uncle). I'm wondering.. is it possible that my grandma could've passed the gene to my mum of whom passed it to me? My mum doesn't have any brothers so there is no way of telling if the gene is present within the maternal side of my family. Every other male I'm related to has thick hair regardless their age which is why I'm starting to get concerned as I'm a Norwood 2 at 19? My hair is still thick and dense. My temples have just receded a notable amount in short time.

My right temple still seems to have recessed more looking at the photo's I've provided. Would anyone else agree?

Lastly can someone clarify where I currently stand on the Norwood scale and whether or not I should be worried?