What Is The Reason For Hard, Red Lump Under Skin On Mons Pubis?

I have a recently developed (2-3 days max) cyst/lump type abscess on the mid-right area of my mons pubis, right where the pubic hair grows. It is red/purplish and a bit tender. It is hard underneith, almost directly under the skin, and there is no sign of a head/entrance to this abscess. It is about dime-sized, if not a little bigger. There seems to be a newly formed, blister type hole on the top layer of skin directly over this bump. It causes minimal irritation. I am a female. I am in a first-time, monogamous relationship with another female. Niether of us have had this symptom before, that we can recount. What could this be?