Feel around in the paw and up the leg to make sure there is nothing stuck in there?
Are there any cuts or bumps or anything that looks different than the other paws?
If you find something repost your new findings.
If you find nothing.
Wash the area off with apple cider vinegar or vinegar if you don't have apple cider vinegar.
Witch Hazel or 100% Aloe Vera Gel (must be 100%) will help sooth the area.
Give Benadryl (generic is fine) 1 mg per lb of dog. Every 8 hours.
Hope fully this will get you through tell Monday.