Back/hip pain

Keara • I'm newly pregnant thanks to Glows fertility tracker app!
Hello ladies!! 
I need advice.. Since about 9weeks I have experience terrible back pain. I was just diagnosed with "round ligament pain" it has gotten progressively worse since. I am now 26 weeks and can't walk.. It's painful and my hips feel like they're going to give out with each step. The doctors just have me a muscle relaxer saying it's probably a pulled muscle. Have any of you had anything similar?