Des bosses sur mon vagin

Hello, I am 22 years old and i have been with the same man since i was 18 , but within the last week i noticed bumps on my vagina that were itchy and painful. also the area between my butt and vagina is swollen. i thought at first yeast infection but the medicine my Dr gave me is not working. im beginning to think it might he herpes? i am so scared and depressed :( how could it be possible to not break out for almost 4 years? and why is my boyfriend okay and not showing any signs?

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