Is your breast red or any areas filled with pus/pus coming from the nipple (signs of infection)? If not, you may be severely engorged without inflammation yet. The best solution is to get the milk out. I find that the baby is the best at doing that as the sucking is strong enough to clear all the blocked ducts and relieve the engorgement. Alternatively you can use a breast pump. Put cold compress to relieve the engorgement and pain. I wouldn’t suggest hot compress or massage now as that will make the engorgement worse. If you have signs of infection, see a doctor to get meds. I’ve seen people who wait too long and end up suffering.