Hello and welcome to Mayo Clinic Connect, @gabe79. Not having something to point to with regard to your SOB has to be really confusing and likely frustrating. I am glad you are here where other members can share their experiences and provide you with support.

I see that @otter2154 has already reached out to share with you.

It sounds like you are not convinced that your anxiety alone is likely responsible for your symptoms. I am wondering if you have contracted COVID at any point and/or been tested for antibodies? I am not a medical professional, however, it just feel like perhaps if it has come out of the blue, so to speak, it may be worth exploring given the amount of respiratory complications that follow.