Sciatica pain relief

Any tips?

It gets really bad near the end of the day typically when I’m making dinner (makes sense, after being on my feet all day). And then persists through the night. I can’t find a comfortable position sleeping for more than 30 minutes (right, left, or back) without that entire side getting sore. Also, after sex it feels like my hips are splitting in half. But doesn’t hurt during at all.