helppp foreskin problems

heyy im 15.

i cannot retract my foreskin at all, 5mm at the most.

i CAN still masterbate with ease and with no pain at all.

i have a g/f and will be having sex soon i think.

but WILL THIS HURT??? even thought i can masterbate with no pain.

also will i be able to recieve oral sex (blowjobs) as normal with my foresskin problem?

i cannot get these thoughts out of my head and i need some advice.

thanls