Hi,
Looks like you have developed folliculitis on the pubic mound(area above the vagina).
Folliculitis is the inflammation of one or more hair follicles. The condition may occur anywhere on the skin.
Folliculitis starts when hair follicles are damaged by friction from clothing, blockage of the follicle, shaving or too tight braids too close to the scalp [traction folliculitis]. In most cases of folliculitis, the damaged follicles are then infected with the bacteria Staphylococcus (staph).
It appears as pimples or pustules located around a hair follicle. Very painful.
Topical antiseptic treatment is adequate for most cases.
ref:http://en.wikipedia.org/wiki/Folliculitis