Stay on top of Motrin for afterbirth pains and engorgement. It helps with both. Take it religiously around the clock for 2 weeks straight. By then the cramping and engorgement will be gone. There are also these little gel pad things called "soothies" I think? You stick them on your breast and they have a cooling affect that feels good. I used those with my second and they were really nice.
I don't have any advice really. I tried the hot shower the first few days, and it didn't really do anything to help. All I really do is pump and nurse to relieve the pressure, Jonah is good about nursing both sides, so that is temporary relief! The last few days the pressure and hardness have been a little less, so I am glad about that.