Thanks for the feedback. Now I am worried my test will again be inaccurate.
My last round of tests were done when I had an antibiotic resistant strain of a staph infection. This time I was in a hurry to get the tests done before I go to the Cleveland Clinic next week and I had a cold. I was no longer running a fever on Monday when the test was preformed, but I was still pretty run down.
Today is the first day that I felt better from my cold but my morning was also back to normal where I woke up exhausted and nauseous. :-(
I think an infection does raise your cortisol level, especially if you have a fever with it. This is why, if you are on replacement med. for cortisol insufficiency, you need to double, or even triple your normal dose when you have an infection - because your body needs the extra cortisol to help deal with the immune reaction to the infection.
I don't know if you would see a change in thyroid levels due to a cold or virus, especially if it's a short term infection, since blood thyroid levels don't alter as quickly as cortisol can. However, if cortisol is sharply raised for a period of a few days or longer, I would think this could lower blood thyroxine.
I love these kinds of questions. I can almost feel my brain neurons jumping as I'm thinking this through! ( Or is it a hamster running in a wheel?) :)