Undecided Question

I need septum piercing info?

I'm 14 and I'm getting my septum pierced this year. I've always REALLY wanted it done but I'd like to know about the pros and cons. People tell me it doesn't hurt, because of the fact that it's just going through those two layers of skin, but I'd just like to be sure. Another this I'd like to know about is after care. And will it hurt when I sneeze of blow my nose? I have mild allergies and I'd like to know about that before hand. Please and Thank you guys :)
I dunno If it helps anything but I've had multiple ear piercings including a forward helix and my anti tragus.