Sciatica pain, help!

Katie
I have horrible sciatica pain in my left hip to the point I end up in tears, sometimes completely unable to walk. I'm 14 weeks and 4 days and it gets worse everyday. I know there are streaches that will help but every site I visit wants me to pay to find out what they are and I'm not one to put my credit card or debit online. Can anyone give me some good tips?