Breast engorgement

I'm day 4 postpartum and have just started pumping for baby (she doesn't want to latch) but the more I pump the more engorged I become and the amount of milk I'm getting decreases with each pump. Tried massaging but doesn't seem to help. Any tips on what I can do other than latching as baby really doesn't latch. Will it go away on it's own? Should I still try to pump even when nothing is coming out anymore?