HI, I understand your concern. Thrush is oral infection by candida albicans ( a yeast ). If your problem is not resolving with repeated course of medication,you should consult a gastroenterologist for deeper examination by endoscopy, & give you oral medications ( flucanozole,/ infraconazole/ amphoterisesne B along with lacto Basilius preparation orally & local application of liquid/ ointment) - sex with condom aggravating it suggests possibility of infection in male partner also, which can cause reinfection after oral sex/ kissing. In such acse simultaneous treatment of sex partner/ avois sex till complete cure are advised. Thanks.