Grammar fix
stress out
become very anxious
to become very anxious and worried, or to make someone feel that way
phrasal verbB1core
Hear it in context
Notice where the phrase sounds natural.
Stop stressing out about it, there's nothing you can do tonight.
The whole move has really stressed me out.
Fix the pattern
One small grammar move makes it sound right.
Forgetting 'out': the natural chunk is 'stress out', not just 'stress' on its own.