Umar ibn Al-khattab رحمه اللّه said:
"No amount of guilt can change the past & no amount of worrying can change the future.
Go easy on yourself for the outcome of all affairs is determined by the decree of Allah.
If something is meant to go elsewhere, it will never come on your way, but if it is yours by destiny, from you it cannot flee (and you cannot flee from it)."
[Imam Bayhagi رحمه اللّه Asmã was Sifät page 243]