Large bump with puss/blood groin area where vagina meets its is pea size and very painful should i be worried? i don't think it's std 1 sex partner.

See MD: Sounds like an abscess, which need to be incised and drained. These can quickly get worse if untreated.

Skin abcess: This is an increasingly common problem I see in my office and often is a consequence of pubic shaving. It depends on where the bumps are but they are usually caused when a bacteria called Staph enters cracks in the skin and digs in. 1. stop shaving (if you do) for now 2. do not squeeze! this can spread bacteria to other areas 3. see your doctor who can treat by draining or with appropriate meds