I had sex multiple times two weekends ago then during the week my vagina was extremely itchy all day and night. At first i thought i just had a rash and it was feeling better by Friday. The next weekend my boyfriend and I had sex again multiple times. Now, this week my vagina is still itchy again and I have one very very small blister on the vagina. It hurts to touch it, but Ive been googling and searching for hours and im not exactly sure what it could be. Im not having any other symptoms. Please help!!!!