Your immune system may still be weakend. Speak with the doctor for a proper diagnosis what it is, and there are other meds if the Diflucan (fluconozole) is not helping and may have developed a resistance to it or may increase the dosage. Nystatin is also good as a rinse or swish and swallow with some oral suspension types you can swallow, like minus the lidocaine. Thrush, candidiasis, is a fungal infection, and feeds on sugar, yeast, processed foods, so look at the diet, and foods to boost your immune system. Probiotics, yogurt may help, is a little controversial with some since you are introducing more bacteria to the body, but say if you do, take the refrigerated type probiotics. Change your toothbrush often since you can keep reinfecting yourself, and maintain proper oral care. Thrush can go to the esophagus, cause pain, dysphagia, to the stomach, and if not treated properly, in rare cases can become invasive/disseminated candisias throughout the body if it eners the blood system, which I had when in the hospital. I hope this helps.