Newb, I don't think it will hurt anything to get some chlorine in there now, but you do need to get the pH down ASAP. As you probably know, your pH could be very, very high as all your test is telling you is that it's somewhere over 8.2

You'll probably get quicker results with muriatic acid than the pH minus (which I think is dry acid or sodium bisulphate). You can get it at pool stores, most Home Depots and Lowes', etc. Since we really don't know how high the pH is, I'd add a quart or even a half gallon of acid, wait a few hours, retest, and repeat.

Be careful with the muriatic if you use it. Stay upwind of the fumes and wear eye protection and gloves.