Thanks for the query.
According to your description, the lump you mentioned could be a Bartholin abscess
When the duct of Bartholin gland
gets blocked, cyst
will form. When the cyst gets infected, abscess will form.
Better to consult gynecologist once and get examined.
You may need one course of antibiotics to cure the infection. Analgesic
and anti - inflammatory drugs will help in relieving the symptoms.