Dude I had the same problem a few years back. I'm uncut, and I actually wasn't taking proper care down below until In started reading internet forums on this same subject. Everyone is quick to say get circumcised, but I would say just practice stretching your foreskin in the shower under warm water obviously. It'll will take a while, but you'll be fine, unless you really have phimosis and have no choice but to get circumcised.

I didn't do this until I was 20 since my dad never really explained what I had to do. I remember when I fully retracted the first time, my skin was stuck to the back of my head and being erect I couldn't do anything. The head was completely exposed for the first time so it took me a while to get used to it. I suggest you start practicing stretching it carefully, now don't hurt yourself either!!