When do you usually notice changes after the procedure?

I have a habit of clenching my teeth, so I am concerned that my jaw muscles seem to be developing more. When I take photos, my face feels a bit more angular than before, and there are days when my jaw feels stiff. I am looking into jaw Botox, but since I have never had it done before, I have many questions.

I've seen many online reviews saying the results were good, but how many days usually do you have to wait after the procedure to see changes? Some people say it takes about two weeks to see results, while others say they saw changes faster than expected, so I'm confused. I'm also curious about how long the effects last for first-time patients.

I would also like to know if there is any discomfort when eating on the day of the procedure or the next day, and how much pain is involved. If anyone has actually received this treatment, please share your experiences regarding when you felt the effects, your satisfaction level, and how long the results last. Since it is my first time, I have a lot of questions.