Brief Answer:
Palpitations.

Detailed Answer:
Hello,
Thank you for choosing HealthcareNagic for your query.

The sensation you are having are called palpitations.Your haemoglobin levels are jjst 6.1gm/dl and you are severe anaemic.Haemoglobin less then 7gm/di is an indication of blood transfusion.Investigations should be done to find out the cause pf severe anaemia.Palpitation are because of anaemia only.Once anaemia is treated palpitations will settle down.
Gew baseline tests to be done are
Ecg
conplete blood count
Peripheral smesr of blood
Iron profile.

In case you have more queries feel free to question.
Thanks

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Brief Answer:
Follow up answer

Detailed Answer:
Hi again,
Hemoglobin and HBA1C are two different things,Earlier you mentioned Hemoglobin only.HbA1c is used to monitor blood sugar levels while hemoglobin is measure of blood content.
Again the sensation you are having are called palpitations.
.A heart palpitation is the sensation that your heart has skipped a beat or added an extra beat. It may feel like your heart is racing, pounding, or fluttering. You may become overly aware of your heartbeat.There can be many causes of palpitations.
Most of the time palpitation is usually associated with some pathological or physiological problem with the heart
To rule out the cause of palpitations i would like to suggest you some of the baseline tests of cardiology like -

24 hour holter monitoring-A small device would be attached to your body for 24hours.It will keep a record of your heart beat (both rate and rhythm) for a perioid of 24 hours.You can also note the time during which you feel palpitations and the rythm at that time could be seen on computer monitor during interpretation of the test.It is the basic and most important test for you.

7 days loop recorder- In case faulty heart beats are not recorded in holter ,A device called loop recorder would be attached to your body for 7days and it will keep a record of your heart beats for 7 days!

Tread mill test -some times the faulty heart beats are precioitated only when the heart is under stress,Tread mill test is designed for that,You will be made to run on a tread mill under monitored condition.Any arrythmia precipitated can be observed on computer recordings.

2d echo -This test will rule out any abnormality in cardiac function,pumping system of heart and will help to find out if all valves of heart are functioning normally or not.
Apart from this Thyroid function test should be done.A increased in level of thyroid hormone can cause palpitations.

Thanks

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