Hello dear,
As you have mentioned in your post that you are taking medication for
thyroid & the status is under control, the role of thyroid imbalance can be ruled out.
If needed, a fresh ECG can be done to rule out any Cardiovascular involvement.
Under such circumstances, the symptoms can be attributed to:
1.
Chronic fatigue syndrome
2. Dietary deficiency of certain nutrients like Iron, Vit B6, Vit B12,
Folic acid, etc. which help in blood formation and nerve conduction.
3. Systemic causes like
diabetes or hypertension
So, kindly consult your Physician & get a proper clinical examination done.
Investigations like
complete blood count, estimation of blood pressure & blood sugar levels will be helpful to rule out any pathological cause for the symptoms.
There is no need to worry, you will be fine.
Take care.