I was diagnosed with Asthma/COPD several years ago and whenever my GP checked my SpO2 readings they were always 99/98. I have had no debilitating breathing problems until recently.... I bought a Pulse Oximeter a couple of months ago as I was waking up with a strange sensation of restlessness, like I was on edge, and this was sometimes coupled to a headache...the symptoms were those of a mild anxiety or panic attack. I don't use pillows as I like to lie flat and doing so does not cause me breathing problems.
The Oximeter readings I get with my meter start at 97 then quickly drop to 94 and stay thereabouts. Doesn't matter which finger is used on either hand. These readings are the same AM and PM.
I'm also finding that I get extremely tired when simply walking about or doing housework.
I had an MI in 2001 and my heart muscle was slightly damaged. I'm not sure if this recently decrease in physical stamina is a lung problem or something like heart failure. I don't have oedema in my ankles.
Do I need to enquire with my GP about my lungs or heart? I only get a few minutes in an appointment and I don't want to waste time in discussion of investigations which may or may not help with a diagnosis.