Hi... I"m sorry I missed your question.
Personally, I had my hysterectomy years before having been diagnosed with IC, so obviously having a hysterectomy didn't help me any. Know of some others that have had hysterectomy in an effort to help alleviate pain, but it hasn't done anything.
I'm not questioning whether or not you have IC, but I wonder if you've been checked for other things that cause similar symptoms, such as pelvic floor dysfunction, endometriosis, etc. Some people have had some success in controlling pain with physical therapy for pelvic floor dysfunction. If you have endometriosis, there are treatments, but I think a hysterectomy is usually what ends up helping the most, but that's not even always a total cure.