thanks for your query.
The only way to know if it is HSV is to visit a gynecologist and test for it.
other possibilities could be a friction sore.
It could be caused by friction during vigorous sex, shaving , allergy
to latex or any other product used locally.
Various other STD
s like syphilis
, etc also present with sores.
It could be a canker sore
have a confirmation by your doctor.