Could this be anxiety?

[NewMoon]

I've had difficulty with shortness of breath on and off for 2 years. It's been mild enough to ignore until recently. The last month has been absolutely awful. I can barely leave my house the breathing is so difficult. I often feel lightheaded and like I'm going to faint. I have a bunch of other symptoms too which point different medical conditions, one of which is anxiety.

I've had a blood test, oxygen test, breathing test, and chest x-ray and everything comes up normal. This is leading me to think that my breathing problem is psychological.

My questions:

Is it possible to have anxiety disorder without feeling emotional anxiety?

Is it possible that anxiety disorder could cause me to be out of breath for over a month? There is never a time when my breathing feels normal.

Thank you,

Emily