19 years old balding? Weird thinning at the very front?

Hi guys, I was always having a pretty long hair (10cm), i shaved it once in January with the 1.2mm clipper, thinning at the very front was already there, i thought it will be gone because i was using a loooot of hair gel and shampooing it everyday back then, in the begging of May my hair grown to about 5cm and i decided to shave em again, but this time with the 0.3mm clipper and now its grown back a little i noticed this weird thinning hair is still there at the very front of the hairline (pic 2), btw. i dont know if this was always like that, ive never paid attention, sadly.

So now my question, is this something i should worry about?

Photos:

http://imgur.com/a/GyAU7LC


PS. Feel free to ask for more pictures, different angles or some.