Thanks for the query.
I understand your concern and will try to address it.
The symptoms that you describe fall under the category of Myokymia
These are benign fasciculatory movements and not associated with any specific disease.
These typically last for a few weeeks and could involve the facial muscles
Stress,Anxiety,lack of sleep are said to be factors
Other causes could be
Drug overdoses like caffeine
Drug side effects like diuretics,steroids
diet deficiencies of calcium or B12
Thyroid disorders can also cause these.
Get your calcium,B12 and thyroid tested.
No specific treatment is indicated.
Fasciculations with muscle weakness
,or atrophy or if they are severe and long lasting need neurological examination by a neurologist
Just wait and watch and there doesn't seem to be any need to go to ER.
I hope it helps however you may revert to me for any further query.
Best of luck