leaking fridge

Hi folks: The last time I asked for help here because of a bubbling in the toilet when I showered, Rid-x was recommended to me. It worked wonderfully.
Now I see water running from under my refrigerator at the right front, just under the corner where the hinges are. I believe there is an evaporation pan under the refrigerator to collect water from the self-defrosting action. Is it overflowing? The refrigerator seems to be staying cold. What do I do? It is an old refrigerator but I cannot afford a new one.