Low pulse oximetry (sats) while on 7 day triple antibiotic therapy

In November I bought a Garmin watch which automatically reads my sats overnight. The lowest was 74% and the average low over 4 months was 82%. I have now come down to 3 days a week for my "Big 3" and my sats have increased slightly overnight. It's only been 10 days but already my average low is 88%. Has anyone else found they have low overnight pulse oximetry readings while on treatment for NTM?
And secondly, any ideas who I report these findings to, seeing as we are all still guinea pigs to some degree.