Square jaw botox review received at the dentist

I usually grind my teeth a lot, but I also get headaches, so I couldn't stand it and went to the dentist. I was receiving corrections so I can't wear a mouthpiece yet. Botox was recommended. I got it right on the spot, but it wasn't as painful as I thought. After just getting the tingling, the effect was amazing. I have this much jaw muscle. I didn't know it was true, but my chin actually became half. I thought it was all bone, so I was really surprised. Instead, as my chin got smaller, the cheekbones became more prominent ㅜㅜ