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The world brings turmoil and real peace cannot be found in it.
These things I have spoken unto you, that in me ye might have peace. In the world ye shall have tribulation: but be of good cheer; I have overcome the world. John 16:33

Only from God can real peace flow, a peace that passes all understanding.
And the peace of God, which passeth all understanding, shall keep your hearts and minds through Christ Jesus. Philippians 4:7

The world is full of stressful problems which vex all men's souls.
These things I have spoken unto you, that in me ye might have peace. In the world ye shall have tribulation: but be of good cheer; I have overcome the world. John 16:33

In the Kingdom of Heaven no problems or stress exist, for it is a place of perfect peace, a perfect vacation from the stresses of the world.
And the kingdom and dominion, and the greatness of the kingdom under the whole heaven, shall be given to the people of the saints of the most High, whose kingdom is an everlasting kingdom, and all dominions shall serve and obey him. Daniel 7:27
Isaiah 11:6  The wolf also shall dwell with the lamb, and the leopard shall lie down with the kid; and the calf and the young lion and the fatling together; and a little child shall lead them.
7  And the cow and the bear shall feed; their young ones shall lie down together: and the lion shall eat straw like the ox.
8  And the sucking child shall play on the hole of the asp, and the weaned child shall put his hand on the cockatrice' den.
9  They shall not hurt nor destroy in all my holy mountain: for the earth shall be full of the knowledge of the LORD, as the waters cover the sea.

When you get alone with the Father in secret, leave your earthly cares behind and just immerse yourself in the river of peace that flows from His Presence.
But thou, when thou prayest, enter into thy closet, and when thou hast shut thy door, pray to thy Father which is in secret; and thy Father which seeth in secret shall reward thee openly. Matthew 6:6
Draw nigh to God, and he will draw nigh to you. Cleanse your hands, ye sinners; and purify your hearts, ye double minded. James 4:8
O that thou hadst hearkened to my commandments! then had thy peace been as a river, and thy righteousness as the waves of the sea: Isaiah 48:18

Do not come with a list of earthly cares and problems for God to solve.
Matthew 6:7  But when ye pray, use not vain repetitions, as the heathen do: for they think that they shall be heard for their much speaking.
8  Be not ye therefore like unto them: for your Father knoweth what things ye have need of, before ye ask him.

Real peace doesn't come by having problems solved.
The LORD also will be a refuge for the oppressed, a refuge in times of trouble. Psalms 9:9
¶Trust in him at all times; ye people, pour out your heart before him: God is a refuge for us. Selah. Psalms 62:8
For thou hast been a strength to the poor, a strength to the needy in his distress, a refuge from the storm, a shadow from the heat, when the blast of the terrible ones is as a storm against the wall. Isaiah 25:4

Real Peace is a spiritual fruit that flows from the Fathers throne.
I create the fruit of the lips; Peace, peace to him that is far off, and to him that is near, saith the LORD; and I will heal him. Isaiah 57:19
And the fruit of righteousness is sown in peace of them that make peace. James 3:18

Peace be still!  Be at peace.
And he arose, and rebuked the wind, and said unto the sea, Peace, be still. And the wind ceased, and there was a great calm. Mark 4:39
And to esteem them very highly in love for their work's sake. And be at peace among yourselves. 1 Thessalonians 5:13