What Causes A Painless Lump Near Vagina?

Lump on left side of vagina about size of large marble, not painful but noticed it when sitting. Have obviously been searching on line and wondered if it could be a bartholim cyst ? Have had several headaches as we ll as feeling feverish for the last couple of days but no fever when I check it? Also had a bad cold about a month ago that I thought was pretty much gone but still have a dry cough. Am going to doctors next week but am concerned . Also am 53 yrs old so not sure if this is menopausal related. I have irregular periods about every 2 to 3 months. I have no blood in my urine nor am I coughing up blood. Noticed lump 4 days ago and have been having warm baths but have not noticed any change as of yet.