Anta,

Thanks for your question(s).  Sorry to hear that you're not feeling well.

It sounds as though your symptoms are heart related, but I'm not sure of the cause.  Your thyroid disorder may be a factor here.  Even though you had a recent check, there might have been a change and a large quantity of hormone may have been released into your system.  Anxiety disorders commonly produce palpitations and even some cardiac arrhythmias.  Your disagreement with your husband a couple of days before may also be a factor, causing more anxiety that could take a couple of days to manifest itself.

I want to assure you that it's very unlikely there has been any heart damage as a result of all you've described. 

Here's what needs to be done.  First, you must find out what was going on in the heart during your palpitations.  Several different types of arrhythmias and "extra heart beats" can cause this sensation.  Because you are feeling back to normal, this is not easy.  Your doctor will do an EKG and may request a 24 hour monitor of your heart (holter monitor) in an effort to define the abnormality.  If identified, then a treatment strategy can be formulated.  Many palpitations are caused by an extra ventricular beat, or an early beat from the small chamber of the heart.  Many of these do not require treatment, just observation.  Of course, repeat thyroid function studies need to be performed.  If anxiety is the final conclusion, that would be a good thing, because treatment for this common problem is easy, effective, with little side effects. 

So, call your physician for an appointment to evaluate your symptoms as soon as possible.  Should you develop your palpitations again, then asked to be seen immediately in hopes of capturing them on an EKG. 

I hope this has been helpful.  Feel better.

Martin Cane, M.D.