Brother, I am just like you.... I can't sleep with thoughts running thru my head after an argument....My wife (God bless her- 28 years in the Marine Corps, two combat tours, numerous other 6 month deployments, (now) two grown kids - with kids - and this year will be our 30 year anniversary)...
generally, you place it against the wall, then push the button on the left side, then slide it slowly along the wall, and it will beep and light up as it hits a stud, then go out until it passes over the next stud, etc. Be aware that a stud is of course less than two inches across when on it's...