last thurs nite a very large lump came up just inside my vigina. the whole area was swollen and very painful. i seen my gp on friday morn,who just gave me an antobiotic. some swelling has gone down,but has left some brusing. the lump is still there and i find it hard to walk or sit down. i also recently have been tested for STI' s which were all negitive.thank god. this looks like a cyst. should i go to A& E ?