Hello,
It is safe to treat chronic recurrent yeast infections medically. A well studied regimen is Diflucan (Fluconazole) 150mg by, mouth, 72 hours apart, then continue weekly Diflucan 150mg by mouth for six months. Common side effect might include nausea, headaches, rash or possible an increase in liver enzymes. Generally speaking it a safe medication. Try the dietary changes suggested and know what I mentioned is one approach to take if things do not improve.
Best regards,
Dr. Downing