i recently got a test for herpes and it came back negative. i havent slept with anyone since the test. i still have my doubts because i felt kind of itchy down below, and then it started to hurt and i notices a lump where i was itching. could you tell me what this is. i didnt notice any blisters. maybe its from scratching too much, what does it look like? the only real pain i feel is on my labia. i just had a yeast infection a week ago.