I definitely had that when I was pregnant with my daughter! (But it was under my left breast) I think it was from the weight of my breast in combination with the pressure of my organs and the baby running out of space that caused the skin to "fall asleep" and go completely numb. It definitely itched like crazy, and I spent some time just holding up my breast to make it feel better. I also used lotion (burt's bee's "Momma Bee" belly butter) and cold packs to soothe the itch. I would only put a cold pack on it for a couple of minutes at a time, and my daughter would actually kick the cold pack (I don't think she liked it)! It was a weird sensation, more annoying than anything else. It went away as soon as she was born. Congratulations on your pending arrival! Good luck and enjoy your last couple of weeks of pregnancy!