upper back muscle pull..OUCH

Today was supposed to be deadlift day, but when I attempted to lift the 135lb, I fell a pull on my upper back. IT DID NOT FEEL GOOD. bummer. I kept feeling it even after I stretched it out a bit more, so I stopped deadlifting for the rest of the workout. It also gets me thinking about changing up my strengthening routine for a few weeks. I'm bored with my current cycle routine (currently 6 weeks) and tired of making routines up. So for the next 6 weeks or so, I'm going to just go to Barry's Bootcamp Mon, Tues, Wed, Thurs, and Saturday.