Fit people can have a relatively low heart rate at rest - typically 40 per minute rather than 70 odd. Some go down to the 30s at complete rest - bed/watching TV. This is "healthy" bradycardia, but it can alarm some health professionals and will often set off audible alarms on for example heart and oxygen monitors. Paradoxically, in some people, a slow heart rate can permit a faster irregular rhythm to take over - atrial fibrillation - which can be more than a nuisance and require treatment up to and including a pacemaker.
What symptoms do you have?