I have also experienced a loss of sensation in my toes, and can no longer move them well. Since sitting up makes my pain worse, I have been
lying down. I am on oxygen at night, but I have noticed in these past few days I become sleepy while lying down, so I put my O2 on to take a nap. The increased O2 wakes me up, and I feel fine, no longer sleepy. It makes sense to me that lying down is causing me the same problems I was having only during sleep.