As you said, you can't feel it; that's all. You heart is surely beating regularly and inability to feel your pulse can be due to many reasons, having a cardiac arrest
is not one of them. Can you please tell if you have any symptoms associated with inability of feeling your pulse like dizziness
or blacking out? Are you thin or obese? Due you feel (without a finger on pulse) that your heart beats are not regular.
The first time this happens to you, please put your index finger in front of your ear and apply gentle pressure. If you couldn't feel it, then put index, middle and ring fingers of your right hand in the right left side groove between your trachea (windpipe) and the muscle adjacent to it (sternomastoid muscle) and press also gently for 15 seconds. Sure you will feel your pulse by this method.