With a CYA of 50, you want to keep the chlorine between 3-6. But, since you had a lot of rain and the pool clouded up, you may want to go ahead and shock the pool up to about 15ppm for a couple of days. Run the pump 24/7 while you are working to clear it.

Keep an eye on the pH. You're ok at 7.2, but don't want it to go lower.