I have been struggling with symptoms of a yeast infection on and off for 6 months. It all started after taking antibiotics for 10 days in June 2013. Ever since then I have had vaginal irritation, burning, itching, and a whitish chunky discharge. I went to see my GYN and she prescribed Diflucan. It eased the symptoms, but became worse after completing the medicine. So I went back to the GYN and she prescribed diflucan again. I have been back to the doctor several times for the same symptoms so my doctor prescribed Boris Acid 14 days. This really helped the symptoms but once I stopped the medicine my symptoms came back. I have tried this medicine several times with the same result. I still have the vaginal irritation, burning, itching and white discharge. My GYN has taken a swab and looked under the microscope every time I have gone to her. She said I definitely have a yeast infection and sent it for a culture. The labs keep showing a negative result for yeast, other vaginal infections and all STDs. I don't understand why my doctor can see the yeast under the microscope but my cultures are negative. I also don't understand why the medicine prescribed to me eases my symptoms but never takes them away completely. I have even tried a douche with garlic and water, which helps but does not relieve all symptoms. Can you help me? Do I have a yeast infection or could it be something else?