I Had What Started Off As A Small Hard Single

I had what started off as a small hard single lump on pubic hair area closer to the labia. After about 3 days it became bigger and very painful and about 1-2 days it burst and drained a little blood, and yellowish clear fluid. It does not hurt anymore and isn't draining. It has gotten alot smaller but the lump is still there. What can I do and what can this be?. Is it Herpes?

By the way i have gotten these single lumps a few other times but they have never got big and painful and never drained, they just usually go away after a few days.