Yes.
no, eventually it will heal
yes it is the most painful piercing
Please answer
It sounds to me like your talking about a dermal or a horizontal navel piercing which is a surface piercing. But from the sound of it it's a dermal piercing because I've never seen a surface piercing with 3 balls unless there 3 different piercing in a row. I could help you more if I saw a picture of what your talking about.
You won't have that problem if you go to a professional.
Usually the piercer will have numbing gel which they will put on before piercing, but if you want it numbed find out before you have it done!
I'd say this question has to have an opinion answer. i think the least noticable piercing would either be bellybutton or tongue because those places are usually covered up.
I had my bellybutton pierced about 6 months ago and i can still remember how painful it was. I am not trying to put anybody off but it is the most painful piercing i have ever had and i am really high pain threshold.
Nope, They have to wear them, to make them look like a bunch of slags. hope this helped.
eBay or amazon.
Pain is a relative thing, piercing done by a professional body piercer is quick simple and next to painless.