Vic- my botox always took a week or so to kick in, and a massage usually helped. I think just to work it into the muscle a little better.
My injection sites always get a little swollen and tender- just like your arm gets when you get a shot. It is one of the few times i find ice helpful (i, like you, am normally a HEAT person!!)
I am so happy it went well. Hope it starts working soon for you. Just take it easy.
Johanna