Pain while having sex

Hey guys,

I hope you can help me out a little.

Everytime i‘m (16) having sex it hurts the first minute or so but after that it feels totally normal and i don‘t feel any pain anymore.

I mean i‘m going to a specialist soon but i just wanted to hear other advice as well so does anyone know why or do you even have experienced it yourself?

I‘d be really grateful for answers thanks (: