With the tongue we praise our Lord and Father, and with it we curse human beings, who have been made in God’s likeness. Out of the same mouth come praise and cursing. My brothers and sisters, this should not be. Can both fresh water and salt water flow from the same spring? My brothers and sisters, can a fig tree bear olives, or a grapevine bear figs? Neither can a salt spring produce fresh water.
James 3:9-12 NIV
Don't curse others, let not unwholesome words come from your mouth and also...Don't curse yourself :) When we fall let's take it as an opportunity to rise again.
For I know the plans I have for you,” declares the Lord , “plans to prosper you and not to harm you, plans to give you hope and a future.
Jeremiah 29:11 NIV
^^^
If we believe this and live by it, that will make all the difference. No more doubt and no more living like there's no future for you out there.