It sounds like neuralgia (I get this); Neuralgia is a spasm or 'shortcircuit' of the trigeminal nerve (you should be able to find Google images of the path of the trigeminal nerve quite easily), an attack can often be triggered by heat or cold (eg eating icecream) or by almost any type of physical contact with the face, head or eye (eg having something touching or pressing on the face); the exact triggers are different for most sufferers, but the common feature usually seems to be some kind of stimulation of the trigeminal nerve; some people find they can't wear glasses, others can't wear contact lenses - some people (me!) even find brushing their hair can bring on an attack. If the pain feels like an electric shock that seems to form a 'roadmap' or 'lightening-bolt' shape down one side of your face, it's probably neuralgia.
You might want to see your GP but I'm afraid the only treatment is painkillers and avoiding whatever stimulus keeps triggering it for you. xx
btw good luck in your interview!