I'm 3 weeks post radiation( 30 IMRT) and 4 months post surgery ( madibular resection 40%, jaw rebuilt with fibula, free flap donation from forearm for inside of the mouth, neck and shoulder disection 56 nodes)

The past week or so I have been experiencing increasing episodes of pain in the opposite side of my mouth ( the right hand hinge point). They come on very suddenly, and are very intense. Occassionally the pain eases with a bit of rotation of my jaw, or opening and closing my mouth slowly, but it's really painful. Anyone else experience anything like this?
Wayne