I am constantly checking my pulse!
I noticed when I am resting, the monitor I bought says my pulse goes to the low 50s. I did research and 40s and 50s is normal for fit people. I used to exercise every day three months ago, but I've stopped since then and I haven't been active for a while. I would not worry, but I am getting odd chest sensations as well as a lightheaded feeling. This is what makes me worry.
Thank you all for your suggestions. I will try not to worry about
it. If I did have a serious problem I probably would have been dead by now.