Hi, Matt,
I'm a Registered Nurse and I understand that you are having difficulty believing the results of your tests. That in itself points to the OCD Health Anxiety diagnosis.
If you had a thyroid problem it would be obvious during the day as well as during the night. And, as I already said, thyroid problems are not life-threatening and are easily treated; also, you had blood tests done a year ago and your thyroid function was normal. Why have you got into such a state of anxiety about a thyroid problem, anyway?
I really do understand how you are perceiving what is going on. You are very frightened that the doctors have missed something major. The ECG on Friday will, I hope, calm you down. Ask for a copy and if they give it to you, email it to me if you want. Send me a PM and I will give you my email address.
I am 100% sure that because this only happens at night, it cannot be a problem with your heart. All heart problems manifest themselves all day long, not just at night. You are lying in bed after a busy day and hoping to drop off to sleep, when suddenly you can feel your heart beating. This scares you, your body releases adrenaline, and your heart beats faster and you can feel it pounding away, which terrifies you into believing that you're about to have a heart attack.
I honestly believe that you are suffering from severe anxiety. I know that you find it difficult to believe, but the many people on this forum who suffer in the same way are trying to help you.
Please let us know how your ECG went. It can be read immediately so there shouldn't be any delay in finding out if it's normal or not. I have already said that I believe it will be normal.
The problem, though, is this - will YOU believe it's normal when they tell you that it is? Because you don't seem to have any faith in test results so far. That in itself, is an indication of Health Anxiety Disorder.
We can and will help you through this, Matt. At least we understand what you're going through and have felt the same sensations ourselves.
Love Tess xx