Where did you get the idea of circumcision from? If it's from a doctor then that's who you have to go to to get advice. If it's not from a doctor then that's who you have to go to to get advice.
Seriously, asking us if you need a circumcision is not what you want to do. You have to go to a doctor and get them to look at it. In many cases (including my own only 12 months ago) a circumcision isn't needed. Look up the term 'phimosis' in Google and see what you can find. In my case I went to a doctor, he prescribed a cream which I applied a couple of times a day, and that, coupled with some stretching of the foreskin, was cured after only a couple of weeks.
Circumcision is a last measure. There are a number of things you can do if you've got a tight foreskin. Ask your doctor about it before jumping the gun.
And don't be embarassed about this sort of thing. Since you're asking about where to get a circumcision done I'll assume you're not embarassed, but for anyone else reading, just remember that doctors see this sort of thing a thousand times every day. Tight foreskins aren't uncommon at all, and it's easily treated. Don't be embarassed, see your doctor