At 19 is my hairline normal? Do I need to consult a dermatologist? (photos)

Over the last couple years my hairline seems to have receded some in the temples region and seems to be a little thinner in the crown area. Does my hairline look normal or am I showing signs of male pattern baldness? I am currently using Lipogaine Hair Growth Stimulating All Natural Shampoo but don't seem to notice much of a difference after a month and a half of use. My father still has a mostly full head of hair at 49 so I'm not sure how that could be possible. Thanks