A tender bump in that area can be a blocked gland, a boil, or an inflamed cyst, and often needs a proper physical examination to tell them apart. Trying to squeeze or pop it can worsen the swelling.
Next Steps
Please see a gynaecologist for an in-person examination this week so it can be looked at and managed properly.
Health Tips
Warm compresses and clean, loose cotton clothing can ease discomfort while you wait for the appointment.