Awful sciatic pain

Aly • I'm a 27yr old graphic designer from Southern Indiana just living the family life with my husband, daughter, and dogs! Expecting our second 12/16/16!
Alright ladies... I am 20+4 and having sciatic pain that almost drops me to the floor. It gets so bad that I have to hobble to walk and radiates from the top of my right butt cheek down into my right knee... any tips or tricks for relief? I didn't deal with this until the end of my last pregnancy, it's killing me!