@juanito - I have sleep apnea and use a CPAP at night. Sleep apnea can be one of the causes for the symptoms you are describing. Here is some information that you may find helpful.

Why Do I Have Shortness of Breath at Night?: https://www.healthline.com/health/sleep/shortness-of-breath-at-night

Have you ever been tested for sleep apnea? Usually the test is an overnight stay at the hospital for the sleep study and you are hooked up to a bunch of sensors and wear a CPAP mask.

Polysomnography (sleep study): https://www.mayoclinic.org/tests-procedures/polysomnography/about/pac-20394877