6 days post Orthoscopic FS release and sudden pain in opposite back/shoulder ??

Hello, I'm 6 days post ORTHO release for FS (2nd FS incident, dominate arm) and awoke yesterday with pain upon inhaling in my upper shoulder blade/shoulder of my OPPOSiTE ARM?! So much discomfort that I've been applying heat, self massaging it or having DH massage it. The super weird part is, I only feel the left shoulder pain as I INHALE, but it is far too high for lungs or ribs. Referred pain from the aggressive daily PT post recovery? PINCHED something after sleeping on my non-typical side due to dominate arm being sore from surgery?? I'm stumped and curious if anyone has had something similar post surgery? My surgery followup appt is in 6 days. FS 2011, both shoulders same time, cortisone shot was an almost insta-fix. FS again 5/18, dominate arm. Cortisone shot did nothing, 3 months PT 3x week with shoulder "guru" PT - incremental gains. ORTHOSCOPIC RELEASE 1/14/19