Thanks for writing in.
The sharp pain
could be due to some kind of infection or cyst
(which could become infected). I would suggest that you see a gynaecologist although this does not sound like an emergency. An infection would be likely particularly if you have some fever
or some vaginal discharge
( accompanied by some odor or itching). This would need treatment with some antibiotics.
Otherwise, it could be just some cramping, something a lot of women experience in the time just after a period. I dont think you need to do anything about that and it would g off on its own.
I think it would be best if you see your gynaecologist. Its unlikely that we have something major on our hands.
Hope this helps.