A: In my experience, some of the breathlessness is often due to an iron deficiency, so I would recommend testing your ferritin levels.
Another cause would be mold exposure. I would look into testing with Mosaic Labs, formerly known as Great Plains Labs, utilizing the Organic Acids Test and/or the Mycotoxins Test to see if you are exposed to mold or if you are colonized with mold.
Generally, liver congestion, in my experience, occurs in people that are exposed to toxins. I created the Root Cause Reset program to address this issue. I’ve also written an article that you may find helpful.