Hi Candy
If your doctor has elimated all physical causes, such as infection, it's most likely TMS at work again. I've never suffered from pelvic pain myself, but IC was one of my symptoms, so same area.
This is very common and to be expected. It's just your brain trying another distraction on you before it eventually gives up. Don't let it frighten you, that's exactly what is required to distract you from your emotions.
I know how uncomfortable this is, but be brave and tell your brain that you know what it is and you're not buying into it. It may not go immediately, but if you try to accept it as TMS without fearing it, it will fade away.
Keep up with whatever TMS education programme you've chosen, you can do this it just takes practice, time, patience and courage.
The heart of TMS healing is very simple, LOSE THE FEAR, LOSE THE PAIN.
I hope you get some relief soon. Don't be a martyr to it, if pain medication helps take it.
Bless you