Since you quarantined and relaxing your HR and BP will be either normal or less than normal in case you are working out like athlete. If you have no symptoms nothing to worry. Since your heart rate appears to be less recheck with different instrument or get manually checked by checking radial pulse near wrist. Since you are checking on your own without any symptoms. In case manual pulse count or different machine records low heart rate get one ECG done and show to any nearby available doctor
Next Steps
Get your instrument calibrated. Recheck
Health Tips
Keep doing your exercise, continue healthy lifestyle