I had a little bit of thrush around 32 weeks. Luckily very mild and I used some caneston cream and it only took about 2 days to clear up. The Pharmacist told me it was OK to use, but just dont put the cream too far up or right near your cervix as it could irritate your cervix.

My GP has told me about the yoghurt too. I tried it and it does actually work!
He also told me to go commando and sit out in the sun with my legs open, PMSL!!! I wasnt game enough to do that though!

I was also told its quite common during pregnancy.