I think I might have sleep apnea. I am a 22-year-old male. About three weeks ago, I had a cold, and two weeks ago, I started to feel more tired than usual, with mild lightheadedness, although that has been improving. From more than two weeks ago until today, I have been suffering a lot of anxiety and overthinking. A week ago, I started to feel some tightness or a stomach knot in my upper stomach, and a few days ago I started to feel a pushing sensation in my upper stomach when I lie down in bed. It makes me uncomfortable. When I wake up, I do not really feel fully rested. I can still do my daily activities without problems and also work out, but I was worried that these symptoms were caused by sleep apnea, which can be an early sign of respiratory onset ALS.