Hi Welcome to Health Care Magic......
Your complaints can be due to 1) Anaemia
low heamoglobin or less amont of blood in simpler terms- so get a Heamoglobin levels checked up .2a) Arrythmias i.e heart beating abnormally fast or2b) Aortic regurgitation
a cardiac valve abnormality- get a ECG and a echocardiography
done which rules out any cardiac problem if any. 3) Hyperthyroidism
- if you have other symptoms of increased sweating, increased bowel movements - get a thyroid profile done .These are the three common causes of palpitations and light headedness and the possible course of action required.