Mid-forties. Have had thrush about 3 times in the last 15 years, until recently.
The only change I can think of is I began swimming regularly a couple of months ago. Could it be this, or maybe a change in hormones due to age? I have no perimenopause symptoms. Older female family members have also started the menopause very late in life, I know that doesn't mean 100% that I will be the same but it does make it a little more unlikely.