It does sound like an ingrown hair. The same thing happened to me puss and clear and blood I went to doctor they said infected hair put a warm wash cloth on it.
It doesn't seem to be that because as I squeeze the puss becomes clear and a little bloody so I don't know
sounds like an ingrown hair that has gotten somewhat out of control due to sweating, rubbing from your underwear, etc. totally normal and a lot of females get them - especially in the summertime, due to the heat.