Extreme back pain

Miranda
I have been along things real easy and I only work three days a week because of my back pain . It's getting so bad that it's keeping me up till 2,3,4 am . It's my first pregnancy , and I really need advice to ease it . I take Medicine for it , I use a heating pad, I try stretching , and I even went to therapy for it . Nothing has been helping . Advice ??