hun i would really wait until a few weeks, iv had my neck pierced and it was a little uncomfortable to sleep with for quite a few days until it settled. when you have your boobies done you wil find sleeping a right pain. im now 10 days post op and sleeping with a v pillow means it rests on nape of your neck, so you dont want to have that pierced aswell or you will be so sore.
i love my neck piercing but it did take ages to heal. xx