I suffer from an issue for which I feel uncomfortable,dizzy,anxious and sweaty...it happens may be once or twice may be in a couple of months...and once the feeling subsides most of the times I have nausea or digestive problem. Besides once I was suffering from dengue fever and I had the same problem at his clinic while waiting...and the doctor measured my pulse rate and found quite high while b.p. being low. He replied it might be due to fever and asked to stay hydrated. Couple of years back i reported this to a cardiologist and he measured ECG and found normal. Though the problem is infrequent but it happens. Kindly suggest.