Hi, I am 29 year old female. For the last 4-5 days, my sleeping heart rate has been between 48-49. It usually used to be 51-60. Is this concerning? I had my periods last week and that's when it started. I used to feel a bit dizzy during my periods. Nothing major. I do have heart palpitations (whenever I am stressed or anxious). I am currently on my weight loss journey and have lost 10 kgs in the last 5-6 months. Is there anything to be concerned about the below 50 heart rate or it's normal?