Just keep going! No diet that claims you will lose that much weight/size in such a short amount of time is worth your time. It takes hard work and patience, and there will be "mistakes" but we learn from them and keep going. It WILL BE worth it.
Yoga For Back Pain Infographic.The benefits of yoga on symptoms of lower back pain are mostly physical as a result of strengthening and stretching of muscles. I have scoliosis so maybe this will help with the pain