Almost 33wks and my colostrum has come in. I've noticed expressing some of it relieves the…

Almost 33wks and my colostrum has come in. I've noticed expressing some of it relieves the pressure\pain in my breasts. I know your real milk doesn't come in until after birth, but does expressing it increase the amount each time? I only leak a little, but I've got 7 weeks left and I don't want to have to get pads this early.