I am 27 years old and decided to grow a beard. After 3 weeks I had a full enough mustache, goatee, and OK growth on and and underneath my chin. I have nothing but five or six long hairs on each cheek, and my mustache does not connect on the sides to my beard at all. Basically, it seems I can grow a mustache, goatee, and a chinstrap beard but nothing else. Is this normal?