Numb hands

Hi mummies, anyone experienced hands numb every time u wake up after sleeping and throughout the day it doesn't go away? Both my hands at least 3 fingers are numb and last the whole day.. i am already close to 4 months postpartum and it started being pain till they went numb about a month ago already.. any advice please? First time mom here. I usually massage my breasts during pumping and carry baby alot..