Can botox to your forehead cause metallic taste facial numbness? If not why is others reporting these also?

I had 24 units to my forehead today. Right side is now numb, heavy, slower movement. No rash or allergic symptoms. I also -when injecting -had a metallic taste in my throat and later back of sinuses. I reported the metallic taste immediately to doctor. The taste is still there. Went back to clinic 2 hrs later with the symptoms. Basically the doctor passed it off told me to go to ER, But I seemed fine. So I looked it up and others have done this. I am an ER RN..I do not panic.