Felt very tired, fell asleep very fast but heart seemed to thump and i woke up, my heart rate was down to 50. is there something wrong?

Information: Not quite enuf info here: you likely have and :arrhythmia which statistically at your age is benign. But since it is new or a change, you ought to see either an internist or cardiologist, an ekg may solve the issue or u might need a 14 day event recorder. The real ? = "why": caffeine, sweets, mitral valve prolapse, familial tendency, stimulants, even meds like thyroid/claritin-d/nyquill... Hrs, .