Spot on too much nicotine, it will create all the symptoms. Sound like that Dr knows nothing about vaping to me, another professional jumping to conclusions baaaaa. Id like to know if that doctor has some kind of special vision to see the ingredients by looking at the juice.
Most people who vape are aware of the possibility of taking on too much nicotine and the symptoms to look out for and they have found their limit and strength. I vape 28mg at moment but first sign of a headache I give it a break. Cut down on the strength Nige.
Simon