My neurologist does the sleep study at his office. Your primary care could probably do it. I arrived atcfacility about 7. Within an hour, the attach these things to your head, like little cords but you don't feel anything. You can't even tell they are there. They put one on your neck and your leg I think. Then you go to bed. The TV is set to go off at 10:00. They wake you up at 5:00 unless you wake up close to it. The doctor reads the study then will tell you to come back for second half where you'll sleep with a mask on. I used the nasal one and it wasn't bad. He said I had a mild case anyway, 31 episodes in 1 hour and my sat level dropped to 89% which he said wasn't bad. I told him I wanted just the nasal one because I breathe through my nose. I did not want the one that covered mouth and nose. Then he tells them what to set machine at, mine is 5%, very low, and they order the machine. It's very small and makes no noise at all. I take the metoprolol 25. I was on atenolol but an ER doctor changed it. It helps a lot. Sometimes if your heart is beating very fast, bear down like you are going to have a baby and that usually stops it. Or you can cough hard and that helps too.