As Janet suggested above, go and buy a bunch of jugs of generic Walmart bleach. You can use it to shock your pool. Tonight, pour in 3 of the big jugs of bleach that are around 1.5 gallons each. That will take your chlorine level up to around 10ish. Pour it slowly in the skimmer while the pump is running or slowly in front of a return jet, being careful not to splash you or your liner.

Run your pump 24/7 while you are fighting this.

What kind of filter do you have?

Don't add 24 lbs. of anything to a pool! Don't worry about the alk or CYA right now. Your pH is ok at 7.2 but if it drops any lower, you'll want to bump it up some. For right now, let's just worry about the chlorine level unless your pH goes below 7.0. If it does then you can add Borax. Or, since your pH and alk are both a little low, you could use a Arm & Hammer washing soda which will raise both at the same time.

Also, while at Walmart, buy the OTO kit like Janet suggested above to use for now but order a Taylor K-2006 or 2006C.