Help my irrational ‘crate-injury’ fear

I have a new 10 week old shih tzu. She's spunky and tiny. My son paid alot of💰for this 'replacement' companion for me & I fear that I will sleep to heavy & not hear her in distress, etc… I'm 15 yrs older now & much more set in my ways since I last had a newborn puppy!! Fatigue is a real thing. I need a times in and out type schedule idea that has worked for any of you guys…Please & Thanks I need some rest🐶😫