Sorry to hear you are having such unhelpful experiences with the doctors... unfortunately, nothing new for most people today.
Most of the doctors in the US work within a medical culture controlled by FDA/Pharma/AMA which actively denies parasitic infections and if the doctors do not comply they are "flagged" in some way or another.
Since parasites are involved with the root causes for most diseases, effectively addressing this issue would severely impact the profit margins which are much larger than the profit margins in the cancer industry and look at what they do do doctors who successfully treat cancer....
So, this is why lab testing is useless and medical training regarding parasitic infections in the US is extremely poor - this is also the case with fungal diseases and nutritional therapy.
In many subtle and not-to-subtle ways they are "training" practitioners and the public to look at other causes for their health woes and not at parasites, fungal diseases and nutritional deficiencies. Of course, there are the toxins..... same situation.
There are quite a number of parasitic conditions that can cause urogenital pain and other symptoms.
Schistasoma haematobium is a main cause of bladder cancer. A urine test can detect the ovum along with the other markers.
Strongyloides is known for dragging it's pathogen load wherever it desires to lodge in the body, including the urogenital area, and creates infections and even sepsis. There is testing for this.
There are others: ascaris, pinworm, etc....
A friend of mine had two girlfriends with bladder cancer due to Schistosomiasis, bladder cancer is on the uptick in the US.
There are still some "real" doctors who actually aggressively test for parasites though, they are harder to find for some of us. They are usually holistic practitioners which can be an ND, DO, MD, NP, PA,...
Contact as many holistic practitioners/clinics in your area, you might be surprised to find several are routinely treating for parasitic infections. Do not go to a clinic that does not regularly treat for parasitic infections since any "real" health provider today knows most people are dealing with this plague.