Hmmm...well I guess just leave. Check another house. While that hammer is a weapon, it's likely to stick in the domes of the undead, making it more useful in single encounters than dealing with multiple.And of course, remain stealthy.
Smash that forgeter's head in before he can even realize what hit him. Make sure you remain silent in your approach.
Calm the forget down. I promise that you can get a chaingun at some point if you stay quiet. You'll get to shoot as many Pinkies as you want later.
Go to the right - the left is covered by two zombahs, the front one has his back flank covered by the other. An almost tactical movement by le zombahs.Keep it quiet and make sure you aren't in the ghoul's line of sight.
Is it possible to kite the zombies or something? Let only a few see you at a time, finish them off, and repeat?
Get the forget out of there. Quietly. Head back and look for a more clear route out of there.
Blue house on the right if we didn't visit it already, otherwise go to the other blue house on the top left