I started puberty very early with my first ever body hairs growing when i was around 9. But right now i am 16 and have everything developed around my body except my genitals. They haven’t grown and my balls are still relatively small. I also don’t really ejaculate. It only really happens after long times where i haven’t climaxed and when i do it is only a drop or 2 but every other time there is nothing. I am also quite overweight so could this affect my growth? what is wrong? should I see a doctor?
All bodies are different. You are just 16, so that means that you definitely have not “technically” fully developed yet. If you’d like to, you should totally get a physical done or simply ask the questions to your doctor just to be sure! I am not a doctor/specialist
I was the same, I am 26 now but I only started properly ejaculating when i was 17, my penis also has always been small when flaccid but when i was 17 it started getting bigger when erect, so even though when flaccid I’m only around 1-2 inches (shocking I know) its about 8 inches when erect. My advice is dont panic, be patient and yes i believe losing weight will help
I am guessing it all start with who you are comparing yourself too? Often porn might be very deceiving. a good general rule is that if you are worried you should seek advise from a doctor… Best case they would say it is normal do not worry, worst case they would help you out 
so yes your GP is a good place to start. Re being over weight, this could be again a situation or perception. you might think it is smaller than it actually is…