IT sounds like you are going through puberty just fine so i dont think hormones have anything to do with it.
Can you tell me how big your penis is flaccid (not erect) and erect? also how are you measuring your penis from what point to what point?
your penis will look smaller to you than to other people due to the perspecitvce that your looking at it. also when you push the fat on your pubic area in towards your body you should be able to see a little more of your penis.
I hope this helps some and with more info I can offer you more. (better) advice.
its normal with some guys..
make sure in mind that u r not alone to have such thing..
dnt b depressed at all..
its small but its healthy and it vl produce things also which it is meant for..
hence tc brother..
search at google..there are some vegetable and fruits which helps in both length and hormons..
al d bst..
hey bud your penis will most likly continue to grow some untile you are in your early 20's. Also it serves it s funciton. most of the nerve endings are within the first two inches if the vagina. Also when you took the measurements did you push back on the fat in your pubic are? that could add an aditional inch or so