The vanity of thinking that we must take in today, tomorrow, and hash out yesterday -- all of it is fussy nonsense.
Jesus taught us:
"But seek ye first the kingdom of God, and his righteousness; and all these things shall be added unto you.
"Take therefore no thought for the morrow: for the morrow shall take thought for the things of itself. Sufficient unto the day is the evil thereof." 9Matahtew 6: 33-34)
His Kingdom is greater than your yesterdays, your today, and your tomorrows!
"I am Alpha and Omega, the beginning and the ending, saith the Lord, which is, and which was, and which is to come, the Almighty." (Revelation 1: 8)
It is rank hubris for us to take thought for the morrow, as if He is not taking care of all things for us. Yet something within us makes us feel that we are irresponsible or dissolute if we do not worry. Through Jesus, we have the perfection that we are longing for, the peace of mind which frees us from an evil conscience:
"For by one offering he hath perfected for ever them that are sanctified." (Hebrews 10: 14)
All the "what ifs" and "premonitions" are merely distractions from an enemy who wants us to look at ourselves instead of rest in the Finished Work of Christ Jesus. Here is the simple response to the deceptions, tremors, and fears which cause us to look at ourselves instead of the One who loves us, justifies us, and lives through us:
"Likewise reckon ye also yourselves to be dead indeed unto sin, but alive unto God through Jesus Christ our Lord." (Romans 6: 11)
"Let us labour therefore to enter into that rest, lest any man fall after the same example of unbelief." (Hebrews 4: 11)
What are we called to believe?:
"Jesus answered and said unto them, This is the work of God, that ye believe on him whom he hath sent." (John 6: 29)
Believe on Jesus Christ for all, for He is our rest:
"Come unto me, all ye that labour and are heavy laden, and I will give you rest." (Matthew 11: 28)
He is our rest, He who has been from the beginning (1 John 2:13), who never changes (Hebrews 13: 8). If He has everything, then it makes no sense at all to ask "What if?"