go by how your body feels. but dont stop training it. i dont mean hard, but maybe high reps and light weight to pump some blood in it.
do you stretch??? stretching khas help me stay injury free while doing have weights. I would suggest, icing it..
by reading that your not hurting. it kinda makes me think that it maybe just a broken blood vasol. but see if it clears up. and returns to you natural skin color. but if not, and its killing you tomorrow then you should see a Dr.