I have Botox scheduled (3 weeks) - can I get a nerve block to hold me until then

I have Botox scheduled in 3 weeks. I have numerous Botox treatments in past with much success of eliminating my daily symptoms. Due to change in insurgence and provider availability, I have been without treatment for 6 months. I am looking for advice on whether I can receive the Allegio Nerve Block to tie me over until my injections on November 8th? I want to avoid any complications, however I want to ensure I keep this appointment due to the great success I've had with the injections over the past year and half.

Michelle