I had to go for an ECG to my GP's surgery and the nurse who was doing it is a very helpful and sympathetic individual.
She called me in almost 15 minutes early (I am always early for appointments and it often pays off!). While getting ready I mentioned that I was having the ECG because of the heart damage due to under-treatment of the thyroid.
She suddenly said "I've been worried about my thyroid lately, and I've been told there is nothing wrong" We had a discussion of her symptoms while she was waiting for the next patient to arrive.
It seems she suddenly put on weight last year and got very tired and bloated. Then at the start of March this year she suddenly lost a lot of weight and felt anxious, exhausted and had symptoms of a racing heart.
To cut a long story short (her next patient had still not arrived!) she is going to ask her own GP to do tests for TSH, T4 and T3 plus antibodies.
Let's hope that she gets the tests she needs, or as I advised her, that if not, she has them done privately.