I am having sudden headache from past few years. But this time it's getting worse. I get sudden electrical shock feeling in my head. And headache lasts long and very sudden. I feel dizzy and sometimes feeling of nausea. I am having trouble with lights. Few days back at night I was sleeping and suddenly I couldn't feel my left side of nose, left ear and left side of neck. It was paining in the beginning I couldn't swallow then slowly I couldn't feel them, it became numb. I am very confused these days. I easily forget things and couldn't remember what I was thinking or was about to say. What to do?