HELP! Is it Phimosis? My foreskin won't retract, is it a problem?

I've just turned 15 and I also haven't retracted my foreskin but not to worry, try stretching exercises like pulling back your foreskin for about 30 seconds and make sure you don't feel pain. Or if you can, place your index fingers inside your foreskin and stretch. I went with the first option and within a month, it is on the very edge of retracting fully. Hope this helps! Good Luck!