Add water to the clay and pack it on thick around the wound.
I believe you should also consider applying Colloidal Silver and or MSM in your mud pack. Whatever you do...do it now! The sooner you get a pack on..the better.
If you can get Collodial Silver an or MSM...mix it into another mud pack when you get it. You should feel an itchy tingly sensation if you add the collodial silver..but that is good...the silver is doing its work...
You should also be taking high doses of vitamin C.