In the UK am I able to book an appointment on my own or does an adult have to do it?

I have always been worried to talk to doctors out of embarrassment

It doesn’t cause me any pain but sometimes when I pull back the skin when my penis is soft my penis gets hard and the foreskin gets stuck at the bottom which can be a bit uncomfortable and quite tight

Hi, I am 14 years old, about to turn 15, last month I was able to pull back my foreskin for the first time, I was wondering why the foreskin is so tight and why when I am hard I can’t pull it back but when my penis is soft I can do so. I was also wondering why my penis has grown so little and now th...