It is complicated, a specialist is required.
One odd problem some women face is endometriosis, the uterine lining sort of starts growing outside the uterus... and sometimes rambles pretty far..
Something that worries me is the trend to treat young women with hormones to halt those pesky periods.... there may be some problems that will show up later in life from such meddling.
Oh i have been to specialists. Multiple oncologists ..and...surgeons..across specialities.
An organization recently suggested the Harvard undiagnosed network. Didnt know it existed