Hi Cathy, do you get any other symptoms, itchy dry skin, exhaustion, put on weight easily, dry, split finger nails, hair loss, etc. If so, it might be worth getting your thyroid checked.
I have got thousands of antibodies that are attacking mine. I always know that its flaring up again because I get an uncomfortable throat - not exactly sore, but just not right, don't want to talk, feels burning, often need to drink something cold to sooth it. When this happens my TSH goes through the roof. I had been asking for the doctors to look into it for years, and always got the answer that I was 'within normal limits'. Well, normal limits for one person is not the normal limit for another. If your TSH is on the high side of normal you made just need a very low dose of thyroxine. Read up a bit on thyroid and see if it fits.