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Hi, thanks, am reading your query, will be replying in few seconds please. DrVasavada
You can self-test thus - after breathing quietly few minutes, stop breath after inhaling for 10-12 seconds. If you can hold, you are safe. No corona lung.
If you have wheeze like symptom at night, propranolol is to be stopped as it is not suitable for this lung symptom.
Please get your oxygen saturation by skin probe and if deficient, you need to see chest physician.
The level of oxygen carried by blood hemoglobin is given as percent saturation (normal above 90%) and can be remotely tested by a probe worn on finger, as you may see in ICU setting. Physician can have this probe in office too, reading comes on a screen.
Wait out the symptom. Breath more frequently if shallow inhalation there.
This could warrant admission to a hospital. Which you can not due to high risk person in family. Good luck.