Hello. Im A 14 Year Old Boy Who Needs Assistance.

Hello. Im a 14 year old boy who needs assistance. Ive never retracted my foreskin back before until i began a month or so ago. And i pulled it back a week or so ago and i tried ti get an erection to see if it felt fine. But i felt pain near my meatus and it appears white and it hurts ONLY and i only see it when i try getting an erection