You may actually want to think about doing a little less after this strength cycle is up. Greg generally warns people about injury potential if you do the Bulgarian cycle as posted if you're not used to it (now I sound like I'm contradicting myself
I had shoulder pain kind of like what you're describing when I was doing the lifts with shoulders rolled forward. It went away after I stopped doing that. Have you asked Steven Low about this? He knows a lot about shoulder injuries/rehab.