Hello and welcome to HCM,
In case of
hypothyroidism, the thyroid hormones are low.
Replacement with thyroid hormones is required to make for the deficit.
However, sometimes the thyroid hormones increase and start producing effects of
hyperthyroidism.
The symptoms that you have mentioned- racing heart, difficulty in sleeping and menstrual irregularities are seen in hyperthyroidism.
You need to get your fresh
thyroid function tests done.
In case there are any abnormalities in the thyroid function tests, you will need to consult your doctor to change in dosage of the drug that you are taking.
It is not essential to change your doctor but if you are not satisfied, you can do so.
The menstrual irregularities should be corrected once the thyroid hormone profile is corrected.
However, if the irregularities still persist you mat need to consult your gynecologist to find out the cause of menstrual irregularities.
Thanks and take care
Dr Shailja P Wahal