Thank you for asking HCM
I have gone through your query.As your TSH is negative then a free t3 and free t4 can be done.Serum cholesterol
also should be looked for.If you are getting palpitation
then better to do haemoglobin
count also as anemia also could be reason.No need to get worried.Even anxiety causes such symptoms like of thyroid
problem like palpitation.Hope this may help you.
Let me know if you have any further query.