You might not even wake up tomorrow is the saying I heard from a friend of mine.
Unfortunately that is not true. The bible says don't worry about tomorrow but it does not mean you will die in your sleep overnight.
Jesus and James were both very clear when they said a) don't worry about tomorrow found in Matthew 6, and b) do not assume what you want to do that day because you don't know what a day may bring found in the New Testament.
So don't be surprised if someone says you might not wake up tomorrow morning because that is a lie!
Here is the explanation for why they say that: they don't want you to go to bed angry and upset about what someone might have done or said to you. They want you to be forgiven for your sins ahead of time before you go to sleep so that you don't die or the Lord takes you home on time. (That's in His timing not yours.)
Don't be afraid to say what you need to say. Jesus is with you!
With you in the joy of Jesus,