Pulse is 48-55 when I first wake up?

Anyone else have a pulse below 60bpm in the mornings when they FIRST wake up? Meaning like taking a reading the moment you sit up from laying down? Mine is usually 48-55bpm.

I am a 41M and about 10lbs over weight. I walk my two dogs 2-3 miles everyday and eat healthy. Had full blood work about 18 months ago and everything was normal. I was diagnosed with anxiety about five years ago and prescribed Effexor which has helped. I was getting some weird chest pains and was referred to a cardiologist. He ran three tests. Echo, stress test and EKG. All came back normal.

It just really scares me checking my pulse in the morning and having it be below the 60-100 "normal" resting heart rate.

I do sleep HARD ever since I got a weighted blanket. Have SO MANY VIVID dreams with the blanket too. Maybe that's why?