you most definitely need to see a specialist. a pediatric endocrinologist. this needs to be done asap. you will need to have a series of tests to determine the reason(s) for your delayed maturation.
havent hit puberty at 16 (male). i have a small amount of pubic hair around the base of my penis which i have had for around 3 years and a little under my arms. other than that nothing else has changed my penis and testicles haven't grown at all my voice is still really high and i am only 5"2. recently i have been feeling depressed about the situation and it is causing me to stay home more often because it is embarrassing to go out as people think i'm about 12.