I don’t know. This sounds strange. It may be worth avisit to your doctor just to double check on your health.
I couldn’t disagree more with “…clear thought of landing the heel and rolling through to the ball of your foot…”. You should not force a heel strike. In fact, it would be wise for people to, within reason, try to avoid a heel strike. This goes back to the shoes discussion. Heel striking is usually a result of wearing overbuilt shoes.