I don't know which phone you have, but if you are running one that has OS 4.6+, you could set up the side key to bring up the clock, then enter bedside mode. You can change the profile attached to bedside mode, so it will still ring and give you the notifications you want.
With OS 4.6+ THe close can take up the entire screen. There is a menu optio nfor Bedside mode, which puts the clock up on the screen and automatically switches to a different profile (you can choose the profile in the clock settings).
When you exit bedside mode, it switches back to whichever profile was set before you used the clock.
