HI, I Had Juviderm Injections By A Dermatologist On Both

HI,
I had juviderm injections by a dermatologist on both sides of my mouth 3 months ago. The day after the treatment I was sitting in the sun when suddenly I felt a tightness under my chin. That evening I could not sleep and the sensation became worse. It was a strangling feeling. Sometimes I feel that I can manipulate my neck right under my chin and get some short term relief. I have returned to my dermatologist and she gave me an injection to dissolve the juviderm. This has not helped, but has made it worse. I am at my wits end with this discomfort and at a loss as to what to do. Any ideas what could be causing this?