I think if I were in your situation and believing what you believe, I would head back to my integrative medicine doc and ask her to test for toxins.
Have you been to one yet? I didn't have success with mine, but she tried her best with a variety of tests trying to find something abnormal.
If you have trouble finding a doc in your area, you could try this route. This is one of the labs that I tested with for something (can't remember what). <edit: I had their NutrEval test done). I do see from their list they can test for heavy metal toxins and the such. I don't know about things like mold.
Providing contact info at this link will, in theory, provide you with a list of physicians in your area who use them for diagnostic testing.
https://www.gdx.net/patients/practitioner-directory
________________________________