Hello ma'am and welcome.
It would have greatly helped to know your age and sexual status because age would help in the consideration or rulingout of a possible menopausal relsted condition and sexual status would have helped in the consideration or ruling out of a possible sexually transmitted cause. The only other cause to be considered either way is a hormonal
one, for this a blood investigation would suffice. Ot wuld be best to visit your doctor or write back to me with more elaborate details.
Hope this helps.