Tone your language back, absolutely no need for it.
i was being serious, as you didnt mention the size of said "pool mark" it is hard to determine how much has leaked, what size it is etc.
the easiest way to resolve your situation with little or no money spent is to bypass the heater core with some copper tubing, the hoses are just behind the passenger side cam cover, join them together to remove the core from the system - although this stops your heater from working, atleast you wont run out of coolant and over heat the car. then fix it up as per the DIY thread in the DIY section for replacing the core.