Oh you poor thing.
Did the doctor do a dipstick test before he put you on the antibiotics?
In my limited, but rotten exoerience, they need to first rule out/rule in normal uti by dipsticking (you can buy your own off the internet) , or sending sample to the hospital.
The way they diagnose vaginal atrophy is esentially by a quick pelvic exam and to see the level of mucosa (secretions) around your parts.
If you suspect its va please please get them to do this
I am heartily sick of doctors who make smart comments re google etc...its your body, its you who has to suffer, and they are supposed to listen and treat you....not patronizeyou.
I myself have had problems with a couple of docs at my surgery and i was beginning to think it was me until i went on the nhs choices website and saw they were red flagged and one star.
Please persist and i wishyou allyhe very best of luck
Xxxx