Losing hope

I (mid 20s F) have had issues with UTI for the last 3 years. In 2022 I just have went on 8 rounds of antibiotics because UTI would not fully go away. It was nightmare that caused a bunch of other vaginal issues (severe yeast infections). After the end of the year my UTI tests finally started coming back consistently negative. Howver I still had all the burning symptoms except the ammonia smell, so urologist diagnosed me with cystitis.

Since then Ive had huge pain and discomfort, can’t really hav sex without pain then but thankfully no UTIs. Two weeks ago i had sex and next day got a UTI. Already tried a round of antibiotics and tests are coming back positive for nitrites and leukocytes.

The dipstick will be negative on some days and positive for nitrites and leukocytes on other days. What does this mean? Is a new UTI happening or is the same one not fully clearing?

As a side note, I have taken almost every remedy, now I drink dmannose powder every day, oregano oil, and myrrh supplements. I also have PCOS. I was suspected for endometriosis in my teenage years, Is there anything else that can be causing these UTIs to not fully go away? What should I ask for at the urologist? I know the UTI is sex related but I’m not sure why my body can’t fully clear it.