God set Jeremiah apart to be a true prophet for Him to warn the people of their coming judgement.  Jeremiah had a conversation with God about his struggles.

Jeremiah 15:

15 Then I said,

“Lord, you know what’s happening to me.
Please step in and help me. Punish my persecutors!
Please give me time; don’t let me die young.
It’s for your sake that I am suffering.
16 When I discovered your words, I devoured them.
They are my joy and my heart’s delight,
for I bear your name,
O Lord God of Heaven’s Armies.
17 I never joined the people in their merry feasts.
I sat alone because your hand was on me.
I was filled with indignation at their sins.
18 Why then does my suffering continue?
Why is my wound so incurable?
Your help seems as uncertain as a seasonal brook,
like a spring that has gone dry.”
19 This is how the Lord responds:

“If you return to me, I will restore you
so you can continue to serve me.
If you speak good words rather than worthless ones,
you will be my spokesman.
You must influence them;
do not let them influence you!
20 They will fight against you like an attacking army,
but I will make you as secure as a fortified wall of bronze.
They will not conquer you,
for I am with you to protect and rescue you.
I, the Lord, have spoken!
21 Yes, I will certainly keep you safe from these wicked men.
I will rescue you from their cruel hands.”