Bless your heart, you sound really worried.
4.5 inches is within the average - I don't know what the exact exact average is, but in human bodies, "normal" is a range. Like your height and weight are "normal" too, although you're a little shorter than average. That's fine. Some people are a little fatter than average, you aren't.
Some people are a little hairier than average, too, and some guys develop facial/chest/leg hair late. Look at the guys on the Avercrombe and Fitch posters. See much hair there? No.
Doctors don't treat normal with medication - he looked you over and found you to be healthy. That's great news.
Best wishes.
i would have a check up at a pediatric endocrinologist with a focus on puberty delay, just to make sure.
It seems porn has tainted your view of the average size of a male penis. You may not be on the high end of the average, but you are within an average range.
i think your perfectly fine its a normal thing you still got til your 18th b-day jus wait and see cause sum guys dont really fully delvelop til their 21 sometimes but dont sweat it you will be ok
I'm 15 and I'm almost 15 1/2 on erect. I've been noticing that my penis shrinks On flaccid pretty small! This has been happening over about a year. Is it permanent or can I get medication to stop the shrinkage? Any help? Cheers