thanks for your questions. You might have the impression that your heart rate
is irregular which is not actually the case. However, it shall be review your activities lately, or your psychological state. Anxiety
could lead to these symptoms.
However, ascertaining the exact nature of these symptoms could warrant a chest X ray, and electrocardiogramme to measure the electrical activity in the heart and a cardiac ultrasound
to be sure.
Visiting a cardiologist might be advisable for a proper examination and complete assurance.
Hope this helps ,