Tips for sciatica relief??

Angela
Starting about a week ago I have had sciatica really bad. Sometimes it's on my right or left side and others it's on
Both sides. At the top of my butt but not down my legs. There has been a few times where I haven't even been able to walk! Anyone else have this and any tips to find relief? I find it's worse if I've been walking a lot that day, but I can't just sit all day! I need help!