I understand your concern.
Well as you describe,possible causes may include pinched or inflamed nerve locally in chin.
Myokymia-an involuntary, local twitching of a few muscle fibers in the body of a muscle.
Vitamin B12,potassium and magnesium deficiency.
Get more sleep, decrease caffeine intake and decrease stress.
Otherwise, does not sound serious without any other symptoms.
You can try magnesium supplement 400 mg twice daily and include plenty of fruits.
Start a multivitamin containing B complex.
Apply cool compresses.
Take OTC Motrin for few days.
Monitor your blood pressure.
If no improvement in a week, then you can see seeing your doctor for a clinical examination for further evaluation and management.