My girlfriend is actually experiecing this awful pain, and it is the first time. It is not from me, we know that for a fact. She quite possibly knows exactly who it is from.
She was prescribed to Acyclovir 400Mg, and she has been on it for about 24 hours, and has had 4 doses. The pain started about 4-5 days ago, at first she thought it was irritation/yeast infection. Which is why she didnt have it checked out sooner. It is located in the vaginal area, more-so around the opening.