What are some ways to relieve the pain from sciatica?

I'm only 14 weeks pregnant and have been experiencing a little bit of sciatica since my 10th week. It usually doesn't last for very long but when it does I can't even walk. I was just wondering if anyone knows of any ways of relieving the pain, and when it should go away. I know it's not from the baby right now but probably my insides moving around. Any similar experiences? How did you get rid of it?