What Is The Treatment For Sciatica?

I had severe pain down my left leg and buttocks. I went to chrio who said it was sciatica. He said to ice it and come back. I have been in extreme pain for 8 days. I have now finally noticed improvements a little each day. My main problem now is my calf. I cannot stand up more than a couple minutes without major pain in my calf. It feels like it overheats. Is my nerve still pinched. Or is this something that just is a aftermath. How long can i expect this to last.