Hello @bobbiekc, That must be troubling coming home and having your symptoms return after feeling better for 10 days when you were away. I've read about mold and other toxins that can cause health problems but haven't heard about fatigue symptoms. I did find this article that may provide some ideas to see if they help.

--- Sick House Syndrome: 11 Ways Your Home May Be Making You Ill:
https://www.bobvila.com/slideshow/sick-house-syndrome-11-ways-your-home-may-be-making-you-ill-48584.
One thing that amazed me was when we had the ducting in the house cleaned after 20 years. I couldn't believe how much dirt came out of the furnace and air ducts. Have you had the ducts cleaned?