Not sure what to make of this...

I don't know if this has to do with endo or not...hoping someone on here might know. I do have some of the symptoms, heavy painful periods, etc. and history of ovarian cysts. But for over a year now a strange symptom has occured. When I urinate (not every time, but often) there is a very strong odor, can't really describe it, maybe a little like sulfer smelling. There is no pain, no infection whatsoever. I told the doctor about it during my last PAP and she looked at me blankly, saying maybe it was something I'd eaten. (Everyday...for over a year??) I vaguely recall reading the endo adhesions can adhere anywhere, bladder, etc. I'm wondering if this is occurring in my bladder...I know that may sound weird.

Any advice? Should I ask the doc for an ultrasound of my bladder?
Thanks for the info!
:)