Thanks for the responses guys.
I iced it down heavily this morning, and then I was standing in a hot shower for a while. I think its maybe a minor tear, nothing too outrageously painful, just these twinges.
As for me not knowing whether it is a rotator cuff injury or not. You know, i really dont know whether it is or not. I suspected it, becuase I read that rotator cuff injuries are the most common injuries, especially when dealing with benching, over head presses things like that. But who knows? Maybe its not a rotator cuff injury.
As for not taking a warum up set, in the current program I'm doing I never took a warm up set and was fine. Prior to this program, I would do warm up sets maybe 50% of the time, the other half I wouldnt and I would never get injured. It seriously feels like im getting old.
And Yes, the program Im doing incorporates deadlifts and incline bench presses on the same day, I didnt make this crap up myself, a reputable fitness mind did, not me. So please dont criticize my "mix" of exercises and conclude that I dont know very much.
Once again, thanks for the responses. Im gonna rest it pretty good this weekend, lay off next week, see how it feels and take it from there. The shoulder hurt pretty bad this morning but its feeling ok right now, so I'm hoping nothing to serious happened.
I did read Eric Cressey's article "Cracking the Rotator Cuff Conudrum" and I am for sure going to implement some of the exercises he suggests. But, rest for now!
And I will defintely start building my rotator cuff muslces from now on!