Receding hairline at 16 years old?

[Htown]

I just turned 16 and I noticed my temples have been really thin like 2 months ago. I have no one in my family who's bald but some has mature hairlines. I don't even shed a lot of hairs but I still have thin hair. Ps: i have went to the doctor and took a blood test and im clean so Idk if my scalp is fine or not
Im freaking out so much you guys and im dying to know if something is wrong with me so help out and tell me whats wrong.

[mrclean]

Is it just the one side? Do you have any before pictures? It does look like that area is thinning. What did he take a blood test for?

[Htown]

I dont know tbh I just got a haircut and it looks good now

[Htown]

To check if I have hypothyroidism, and the other side is thin but not as thin as the other one . I dont think I have any before pics but I will try to find some