When the foreskin is retracted, does the head of your penis look smooth? Do you see any bumps or rashes or anything? Does it look like there may be an infection? If so, you need to get a doctor to check it out.
Is this the first time you've been retracting it? If it is, it may just take some time, but you might want to get things checked out to make sure the foreskin isn't too tight, or there isn't something else going on.
Good for you for taking care of your body now. :) Let us know what happens.