My heart rate keeps snapping to around 35bpm when I'm awake and resting (while asleep, its around 60). My blood oxygen is fine, Im not particularly healthy or unhealthy, I dont feel faint or weak or anything, my blood pressure is more or less fine (maybe slightly high), and this is a true heart rate (I confirmed the result with a blood pressure cuff as well as by hand). It also snaps to a more reasonable level when active. Should I be worried?