Flan, you've not mentioned any other symptoms but I was actually swabbed and diagnosed with thrush last year and the ONLY symptom I had was lots of white discharge (no itching etc). It has been a lot less since the thrush treatment but I'd not even gone to the doctor about that, I'd gone because of a slightly longer than usual period. She swabbed to be cautious and thrush showed up. So I wonder if perhaps you could ask GP to check whether you have something like that?