I'm a bit confused and worried about my oxygen levels. A few months ago, I recovered from COVID and currently, I'm on medication for anxiety, as my doctor prescribed. I've noticed that when I'm at rest or walking, my SPO2 hovers around 94-96%. But when I take deep breaths, it jumps to 98-99%. I get that deep breathing brings in more oxygen, but why doesn't this happen when I'm breathing normally? Is there something more I should know?