You live in southern NH? Ahh, so do I! :D But anyway, I've never gotten a belly button piercing, but my friend has and she went to Precision Body Arts in Nashua. She absolutely loves the place, she has gone there for all her tattoos and piercings and highly recommends them. Best of luck to you!(:
It cost me 25 dollars with the ring included.
And the pain level, now I'm pretty good with pain and I had my nose pierced and ears pierced, the belly button was definitely the most painful.
On a scale of one to ten, I'd say it's about a six, just because they go through a lot of skin versus your ears or nose.
P.S. ask if you can have a lollipop while they do it, it helps keep your mind off it a bit.