The enemy and his horde have been around a lot longer than we have. He knows how humans work.
Here's the thing: you pray, you wait on God for what you need. There is often a waiting period between your prayer and when God shows us and makes things right. The enemy knows this. It is during this time he will do anything to get you to give up, to quit believing, to fear. For by doing that, we stop the faith process. We give him a way in rather than holding tight to God. He is a "roaring" lion. He devours us with fear.
I wonder how many prayers and answers to those prayers I personally have stopped in my own life because I panicked and then tried to fix things on my own....probably lots.
Don't do this! Don't do this especially when your situation is at its worst, is so desperate. Because this means if you hold on to God, keep believing, you are giving Him an opportunity to come through in a big way.
Just hold on. Don't give up. God is never late.