Now the questions I want to ask Caleb J.

When you say you have hit a wall, is this a wall in practicing harmonic slurs, articulation, or range?
Have you gotten to a particular status and singing C exercise and can’t go any further.

Example: You have completed Presto F# singing C exercises with its practice charts and you can’t do Presto G Singing C?

Do you have charts you’ve been working on and can’t play a particular lick?

What is your wall?
What is your practice routine?

Sometimes going back to the Largo stage helps to freshen me up when things are not going well. I once realized I stopped taking a Concert Hall Breath before my first note.