have you been tested for a yeast or bacterial infection? I am assuming the itchiness is in the vaginal area? If not, I would certainly check into that. There's also over the counter meds for yeast. Perhaps try that and if you still feel discomfort, try to get in to see your Doc again.
Go to a healthfood store and buy primadolphilus (must be kept cold). This helps to balance your good/bad bacteria levels. I experienced this, as well, after about 9 months bleeding. It stems from the mix-up of hormones, and the imbalance of the bacteria. It could be related to yeast, but if you take about 3 of these a day, it should clear up. Over the counter products, like monistat made it worse. My gyno said to take this, and then gave me boric acid capsules to insert, which also helped greatly.