The thyroid tests can fluctuate, too, Grandma. I was tested as having hyperthyroidism. My doctor said to wait two weeks and be retested. I did that and I was normal. Go figure! He checks my thyroid every six months.
Try not to get really upset. Your doctor will figure this out and there are things to help this, too. If you let anxiety get ahold of you, you will feel really lousy!
Let us know what you find out.
Sherrine