You can use canestan. Also...limit your sugar intake as it could make it worse. Change your underwear frequently unless you are wearing a liner (then change the liner frequently). No baths until it's cleared up. Drink lots of water as well.
simple creams that you get from the chemist will clear thrush, something like canneston, but make sure you tell them that your pregnant (if your not showing) and the one that you use for 6 days is the best during pregnancy :)
Very common..drink lots of cranberry juice and water and put a cold rag down there...the colder the better..if you can stand it keep it in your underwear..good luck