Blood oxygen at 73 no breath very weak started about a month ago and steadily getting worse , going from one room to the next i need to rest to move again, lungs are clear heart fine but in a lot of pain due to lumbar spinal stenosis and four vertebrae bo

Smoker? COPD?: Blood oximetry at 73% is generally not good news. It points to a problem with ur lung or heart. Were u ever a smoker? That cd explain breathing & back problems. U may have chronic obstructive pulmonary disease (COPD) which comes from yrs of smoking. See ur doctor quickly to get diagnosed. While COPD damage cannot be reversed, ur symptoms can b treated w/ inhalers, & oximetry improved. Don't smoke!