20 year old, Mature hairline or MPB?

I am 20 years old. Until I was about 18, I never put my hair up, I always let it fall flat on my forehead. For the last 2 years I have been putting it up because I feel like it makes me look older. For the last year or so, I have been extremely paranoid that I may have MPB. I have always had a gigantic forehead and since I was 12 my temples have been thinner than the rest of my hair (due to me going bald as a baby). I have begun to notice that my corners have begun pushing back, although that could be because I never really saw the corners of my hair before. I am having a hard time differentiating between a Mature Hairline and MPB. I have been on 1 MG of Fin for about 6 months. Can anyone help?



This is a picture of me mid shampoo with the hair slicked back totally. No crown thinning at all.