Not being a psychologist in any way, shape or form the only way I have ever found to work through my own Anxiety is to break it into as many steps as possible and tackle each one at a time.
Each alone are minuscule and useless, but together they can get you through it.
Are you on a late night deployment that’s going sideways and it’s your code that’s blowing up?
Get the logs.
Open the compiler.
Look at what is happening.
Validate the communication channels.
Verify the users.
Verify the connection points.
Isolate the problem.
Many little steps, alone they mean nothing, together they solve the problem and stop chickens from running around with their heads cut-off.