So, I did about a 90 percent water change because it seemed like everything was actually high. I have high PH again but very little ammonia. I'm about to dose it back up now. Everything else is at zero. I have fish flakes now. Do I need to add some?
Redose your ammonia back up to 4 again. Doing that large of a WC wasn't necessary but it didn't hurt anything with the BB in your filter. Don't worry about your PH as it is not uncommon for it to fluctuate during cycling. The only reason for the WC was to lower the nitrates a little so they don't get so high you have to do several WC's after the tank is fully cycled because they got so high during the cycle. Your cycle is moving along so don't worry so much about it.