Dear Damir,
From what you describe, you might have whats called a lamblodi suture synostosis resulting in a flat skull. It ususally is not a medical problem at shi age resulting in a functional problem. But it rather creates a cosmetic deofrmity just as you described it.
There are sugical options for this problem.
I would recommend for you to see a craniofacial surgeon and get evaluated. You will need a physical examination and possibly a CT scan.
I wish you the best of luck.