Tata75,
Happy to assist you,

you said,
For the past three days, water has been leaking/freezing at an alarming rate. The freezer had about 2 inches of ice built up and the bottom of the refrigerator is holding water, too. Both crisper s were FULL of water. I don't know if the ice maker connection is broken or what. Looks like I have to cut off the cold water completely to the sink to get it to stop.

Sounds like the ice maker or its line is leaking the water to me. And obviously it will freeze in the freezer.

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bless you,
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