My oxygen level dropped from 98 to 94 and I am concerned. I was diagnosed with AFib in 2011, but otherwise I am a very healthy, active 68 year old who drinks 1-2 glasses of wine/day, eats a very healthy diet and does aerobic ex. 3/week plus Pilates 1/week. Why did it go down? I do feel that I am not able to work out as hard as I used to a few years ago. My Doc said my lungs sound clear and my heart beat strong, but doesnt know why the drop.
Hi, Welcome to Chat Doctor forum.  At this age, people will have a some atherosclerosis, and some alveolar closure and a degree of anemia.  I advise you to consult a chest physician for diagnosis and treatment.  Take more of green leafy vegetables, pulses,sprouts, and protein rich foods to have blood, general health and resistance against infections.  Wishing for a quick and complete recovery. Thank you.