It sounds like a cyst
or an ingrown hair that resulted in an infection of the hair follicle (folliculitis
This usually results in the accumulation of pus, blood and other debris. I would have preferred you to not have it busted, but as you already have please keep the area clean and dry.
Also try to apply a sterile pad in the area and if your condition does not improve in 2-4 days, then please visit a doctor, as bursting it could have resulted in a re-infection.
In the meantime, have 3-7 sitz baths a day and apply warm compresses in the region several times a day.
Hope this helps.