Swollen, painful labia minora

I'm fairly certain it's the labia minora.  It's the fleshy flap on either side of my vagina.  Yesterday, I experienced itching down there, and of course, over the course of the day, scratched and rubbed for relief.  Late in the day, I realized the left flap of my labia minora was swollen and somewhat painful.  It's seems firm to the touch, about the size of an almond.  No discharge that I can see.  The color is normal, perhaps slightly redder.  My first overreaction was that I have a Bartholin's Cyst.  But I'm hoping it's just a bug bite that has become inflamed. I took Benadryl last night, put some Neosporin+Pain on and slept in loose fitting clothing.  It is about the same this morning, no worse.