I received a urethral bulking procedure with the Coaptite injectable implant, now in constant pain, doctors don’t know why?

On February 8th, 2017, I received a urethral bulking procedure with the Coaptite injectable implant. That evening I could only drip pee, but not empty my bladder fully. I was screaming in pain overnight and the next morning my husband took me to the hospital where they drained 2 liters off the bladder. I was sent home and told that I would completely recover. Since then I have suffered from severe urgency, stinging, burning, frequency, pelvic pain and some incontinence. I have seen a urogynecologist, a gynecologist, a urologist, a pain specialist, an acupuncturist, and now I am seeing a pelvic floor physical therapist and receiving weekly treatments of percutaneous tibial nerve stimulation, PTNS. Over these 3 months, my condition has worsened, not improved. None of the doctors I have consulted understand why this happened to me, and do not know how to treat it. At 66, I am/was an elite athlete, extremely active, babysitting grandchildren, and had lots of energy. Today, I spend most of my time in bed due to the extreme discomfort of the pelvic floor pain and the severe urgency. I am taking myrbetriq for the pain, but do not think that it is helping and taking several antidepressants. I wonder what more can be done to alleviate these symptoms, if not get rid of them completely. I do not understand what could be causing these horrific sensations.