I am having some bradycardia too. But then I am on a beta blocker now.

But since I do a BP log, I found it in Nov...two days of 48. That is low for me. I have always been 70-80, resting.

I had been having some aberrant racing times, and elevated T4's so I am not taking my thyroid hormone for a trial period and am getting retested next month. I am actually feeling much better without it. Sometimes people with thyroid issues, swing back and forth hypo to hyper... so for me it is still unresolved until the test results.

But smoking does speed up the heart rate. The nicotine etc does it. I'd keep a log each day, and take your pulse when you get up in the morning before food, and say after you largest meal.
Your rate should go up after a large meal. If you find things that worry you or have symptoms, write them down in the log.

This will help your doctor when you go next to decide what is normal, adjustment to non-smoking and what may be wrong organically.