What sent each of you to the doctor to check for adrenal cancer?

Hi, I am usually on the thyroid cancer site, but today I noticed this site.  It's odd considering I went to my endo today to discuss some adrenal gland failure.  I had thyroid cancer last year.  I was told it hadn't moved out of the small tumer that was removed.  I started getting dizzy when exercising in Jan.  (lowered my synthroid meds) and went away...had another "attack" in May/June.  It was much more intense...low blood pressure, intense headaches when I exercised, itchy and intensely sensitive skin (esp. my scalp), so dizzy I would have to hold on to something, pressure in my chest.  I saw an EENT and had CT of sinus.  Symptoms disappeared and then this week again.  I started intense exercise again and all returned.  I was dizzy when driving this week.  I have a 2/5 year old.  I went to endo today.  He fed me the blah, blah, blah.  I wondered if the cancer had invaded my adrenals.  I would appreciate ANY symptoms, including odd symptoms that any of you may have had associated with your thyroid cancer.    Thank you all!