Hang in there, and keep shocking--the good news is that once you get it cleared up, it's MUCH simpler and a lot less work to keep it up! Go ahead and add a box of Borax to your skimmer--you don't have to wait until tonight. I would start with about 4 boxes of baking soda and then retest tomorrow before adding the rest. Leave the CYA alone, it's fine for now.

Janet