Slow down..breath mate.
Most common mistake by new growers is to over water. Fix that first. The plant may not be able to use the nutes in the soil because its to damn wet. It may also be struggling to find air down there to because its to damn wet (roots need air to). There is no point doing anything until the soil has dried right out.
Relax, breath. Take a step back. Have a cone and stop over thinking and over loving.
"Flushing" ( I hate that word lets change it to Leaching shall we) Leaching the media in a soil grow is to correct BIG problems in soil. You dont have BIG problems so dont do it. The Soil being saturated should be your main concern.
Let the soil dry right out, then go from there.