Hi Bob,
I carry a sweater with me almost everywhere...and living in Texas I do get some funny looks. Seems as if it comes and goes though. But was worse while I was undergoing radiation. I have had my thyroid checked twice and that is not a problem, yet.
I've gotten dizzy if I rise too quickly most of my life and have found that's a sign of low blood pressure. (last time they put me in the hospital one of the jokes was my blood pressure being 80 over nothing) Funny, huh!!! Since being on chemo the dizzies happen more often and just last week found out that dizzy and weakness was a sign of low platelet counts.
I'm sorry I don't remember if you are undergoing chemo this round or not??? But you might feel more comfortable if you ask to have your thyroid checked.
Take care,
Dinah