What Causes Over Stimulation In Clitoris During Vulvodynia?

I have vulvodynia and have been able to control the pain with amitriptyline over the past 6 years. About a week ago, I began having the sensation of overstimulation in my clitoris, having nothing to do with intercourse or masturbation. It is very uncomfortable and non-stop. Any theories or suggestions? At the onset of my vulvodynia, I experienced this sensation as the meds were beginning to take effect, but it only lasted a day or two. Thanks for any information you can give. I am 56, and the vulvodynia began at the onset of menopause. I am 5' 7" tall and weigh 138 pounds.