One thing I will mention that I haven't seen anyone else bring up,
@Belles is that as well as the treatments others have mentioned it is imperative if you have a partner, with whom you are intimate, that they also undertake a course of treatment, else you are in danger of ending up playing Thrush Ping-pong, passing the issue back and forth.
It is unimportant if your partner has symptoms or not. Many, many people carry the candid bugs around with them every day and never know anything about it.
If in doubt, your pharmacist should be able to help you out with tablets, pessaries and/or creams.
I do hope things ease for you very soon. It's really not a nice thing to be living with.