Thanks for your question on Healthcare Magic.
I can understand your concern.
In my opinion, we should first rule out heart related diseases for your symptoms because you are having
hypothyroidism and slow
heart rate. So heart blocks can cause similar kind of symptoms.
So
consult cardiologist and get done ecg, 2d echo,
stress test (trade mill test) and Holter monitoring (24 hours continuous recording of ecg).
If all these are normal then no need to worry for heart block or other heart diseases.
Sometimes uncontrolled hypothyroidism can also cause similar symptoms.
So get done serum TSH and free T3, free T4.
If it is altered then you should change your thyroid drug dose.
So
consult doctor and discuss all these.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.