I has been years since I talked to the medics at the Belgrano, but they did not use to be averse to private conversations with pilots. They can be v discrete. But, obs, there is a risk to your license if they think you shouldn't be flying!
Someone you know will find a way in to the Medic team.
Amongst the various ideas above, the self monitoring of blood-oxygen is easy and cheap to do. Worth doing alongside the blood glucose measurement .