Is it to late to see a pediatric endocrinologist in january if i haven't hit puberty and im 16? what can the effects be if i don't see a dr ? pls help

Not specificly: You get in when they have time to see you. The problems you face have been ongoing for years & any rx would likely run years too. Your pcp may be able to order some basic testing that the endo could use before you go & could get a list by calling the endo's office.

Cause?: Delayed puberty is a symptom. Most often the result of being a late bloomer, but lots of other causes. By itself it isn't an emergency. If you have other symptoms of chronic illness, your pediatrician will have likely already initiated a work up looking into the basics. You're anxious, so have your parents ask the doctor questions to help you better understand and ask if ok to wait.