Stress has a source, and it lifts when the source resolves. A deadline passes, a difficult conversation happens, and the tension drains away. Anxiety outlasts its trigger, or shows up without one at all.
The clinical threshold most clinicians use is duration plus impairment. Worry that persists most days for six months or more, that you cannot switch off through reasoning or distraction, and that has started shaping your decisions, is no longer ordinary stress. Avoiding a promotion because of presentations, declining invitations, or planning routes around traffic are all signs it has moved from feeling to functioning.
Physical persistence matters too. Ongoing muscle tension, disrupted sleep, and digestive problems that outlast the stressful period suggest a body stuck in alarm rather than responding to a real one.
If you are unsure which side of that line you sit on, an evaluation answers it in one appointment.