Normaly I would say GIT A GLOCK!
However in this case I'll have to recomend a good old fashioned S&W K frame .38Spl. or .357Mag. in a 3 or 4 inch barrel loaded up with some good quality defense .38Special +P loads. A model 14, 15 or 19 come to mind or even one of their stainless counterparts.
Good luck!