That's not for you to know.

If the future were your business to know, you would! There would be no need for Psychics and the like. Because you haven't accepted the fact that you're not the one in control of life, it seems impossible to "Let Go and Let God." The worst part is not knowing what the outcome is going to be. And for that reason, you worry at best and imagine a scenarios at worst (nightmares.)

God is in control of everything in Heaven however you seem to have forgotten He is in control of everything on Earth as well. You don't remember this because as soon as things begin to take a turn for the worst, you stress out and begin to worry. Because you've lost focus of Who has the last word (in everything), panic sets in. 

God, the Great I Am, knows why He said  "Come to me all who are weary and carry heavy burdens, and I will give you rest." What you become weary of is the constant worry, anxiety, stress, panic attacks, etc., that torment you because you're afraid of what the future looks like. The heavy burdens you carry is Past hurt, pain, disappointment, anger, resentment, unforgiveness, etc.,. 

God knows He is the answer to everything because He is in control of everything. Peace comes from God given though the Holy Spirit who shows you everything you're suffering from will seize the moment you hand it over to God (and leave it there) because you're no longer concerned with how things will turn out. God says "For I know the plans I have for you. To prosper you and not to harm you, plans to give you Hope and a Future." 

Hopelessness is of the Ego because when you're at this point, suicide seems to be the only solution.  And we all know there is no solution in suicide because there is no Future in suicide. 

Hope and Future are gifts from God. Considering they're from Him, Faith comes because you trust what God has in store for you is better than you can ever imagine. Peace then follows because you know you're in good hands and it's at this point you "Let Go and Let God." Gratitude is not being concerned with what happens next but being grateful to God Now. How? Leave the Future up to Him and enjoy not needing to worry about a thang! Peace