Sciatica Pain

I'm going to be 24 weeks from next Monday onwards. I'm suffering from severe sciatica pain especially more at my right side. The pain radiates from the butt all the way to the thigh kind of nerve pulling. Anyone experiencing this? Very difficult to get on the bed, turn and to even sit down. I can't even lie down straight on the bed. Don't know how I'm gg to to lie down straight for my upcoming scans all. Will this pain go away after delivery? #advicepls