i brused 3 of my knockles on my right hand, do i stop training for a bit, or can i keep training with it?

keep training.

Depends on how bad it is. Training through it won't get them any better, and it will probably just make them worse. Ice them down as much as you can. If you can avoid hitting the bag for a few days I'd do that. If not, just train through the pain.

Put some extra padding over your knuckles under your handwraps like a sponge, gauze or foam.