I'll let others continue with the advice on machine pressure setting and OSCAR runes-reading. This is about relocation, in case you haven't been given this info already.
I assume your daughter has some form of medical cover – both a family doctor and a dentist – and pays a subscription to an American insurance company. It would be a good idea to ask if you can become a patient of the same family doctor and dentist, and a subscriber of the same American insurance company. Makes all sorts of things simpler.
As for your medical records, your new family doctor can contact your UK GP and ask him or her to send a copy of your medical records for the last 10 years. This used to be free, but nowadays a GP practice might charge a small fee for doing so,
There was a time when UK GPs kept all of a patient's medical records, going back to the foundation of the NHS in 1944 if necessary. Nowadays, they might keep your records for – as I said – ten years or so before moving them to an organisation called Primary Care Support England.
So depending on what your GP has kept, you may need to contact that body too.
A useful source of info for people moving from out of the care of the NHS and into the care obtained in another country is given here:
https://www.gov.uk/government/collectio ... -in-guides
As to the risks of sleep apnea, the way to think of it is: it's the same as the risks of high blood pressure. A typical patient with untreated
high blood pressure doesn't conk out suddenly or after only a few weeks. It's when the hbp goes untreated for a long period of time
, putting stress on the whole system, that the patient may develop a stroke or heart failure.
What keeps that from happening is keeping the bp within good numbers. And it's the same with sleep apnea.