nipple piercings

Ok everyone, I am debating getting nipple piercings. Now besides everything else I am worried how they will feel just day to day. I feel like my nipples get sore when they are hard and are just rubbing against a t shirt or something. I prefer to wear a bra. Is it going to feel like that 24/7 if I get them pierced? Or is there another way of describing that everyday feeling?