That's an unusual way to report a cervical screening test.
Normally they only now test for the HPV virus, which is either present or absent.
Sometimes a sample can be insufficient/damaged or otherwise unable to be processed.
But I don't know what is meant by your results.
Thrush shouldn't affect the ability to detect HPV.
I would book the test, you can always take an oral fluconazole tablet the week before it.
Also consider your systemic estrogen levels - if you didn't have VA and need vaginal estrogen, you would be less likely to get thrush and also better able to identify it if you did.
