Botox when muscle is protruding? (Photo)

I have a muscle protruding on forehead very Bad and I am nervous that the Botox will make it worse. I have had Botox twice but I don’t really remember if it was this bad then, the last time was over and year and half ago. Maybe the Botox caused this muscle issue? I have been told it will just worse over time but I don’t want the Botox to make it worse. I am extremely self concious and any help would be greatly appreciated.