Weren't we just talking about this. I did the same thing just over a year ago. If that just happended it's going to look a lot worse in a few day. My left side turned completly black. I mean black it was so nasty and the brusing was about the size of a hand. Did it the same way, straight bar bench. I was just doing a normal but somewhat heavy lift and it just tore for no reason. If it wasn't for the quick thinking of my partner I would of dropped it. Mine was a Grade II tear.
Good luck bro. You will heal but be careful for a while, if you tear it more the recover will take a long time.