Is my masseter Botox working?

Botox shouldnt stop you from being able to clench or move your mouth.  It should subtly decrease the size and width of the jaw.  You may need more units.  In korea they start at 30-60 units of botox each side.  I suggest seeing your expert and looking at photos.  Dr. Emer.

Thank you for sharing your question.  Botox should not be administered to such levels that it paralyzes the entire masseter.  This would make it difficult to chew for3+ months.  The goal is to weak enough of the muscle that it weakens and atrophied, slimming the back jawline.  It sounds as if your treatment was appropriate.  Hope this helps.