Last week I had itching before my periods..which I usually have. This was going to be the first period after I stopped my birth control pills. Nature of iching was to grow to a rash and then dissapearing on its own. This time too I thought it would be the same. But instead I have found a swelling not just at the opening of vagina but a little more inside it as well. The iching has stopped  with the start of periods. But there is a slight burning sensation now. I am afraid. Please help me. Its not subsiding.