Just to let you know I have not had thrush since I was 23. This month (well, late Jan) I got it from about DPO10 - I even posted on here to ask if I should use medication for it.
Anyway, I had thought that with thrush, my cm was dry so I couldn't have been pregnant as CM is excess in early pregnancy. Then was told that an increase in Progesterone can cause thrush.
To cut a long story short - I am pregnant! so thrush was a pregnancy symptom for me!
Just so you know, GP said pessary and cream is fine in pregnancy, but I also used natural yoghurt and Coal Tar soap to sooth my sore bits.
Good luck Xxx