Seven months ago, I was an independent woman with a toy poodle and a rollator. Now I face the rest of my life in bed. — InSeptember, my blood oxygen dropped. I have COPD, so it wasn’t a surprise. But I was caught off guard by how quickly it dropped and how far. I went from a blood oxygen level of 96% to 80%. That’s not enough to stand or be fully cognizant. I lost consciousness…