Constant thrush

Me and my boyfriend keep getting thrush infections, we've had it at least 4/5 times this year already. I know that I'm the main factor for it as I've always suffered from thrush and have to be on high steroid cream to treat it and I follow the full instructions given by the doctor each time which clears it up but then it comes back just as quick and where bothe getting seriously fed up of it now, does anyone have any advice on what i/we should do?

Thank you

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