My wife gets headache , dizziness, fast heart beat frequently?

about 3 weeks ago after having 5-6 light beers at the night she had dizziness , headache and fast heart beat which I thought probably was normal because of the alcohol.since that time she has not drunken anything alcoholic but at least once a day she has this extreme dizziness , headache and fast heart beat.i... show more about 3 weeks ago after having 5-6 light beers at the night she had dizziness , headache and fast heart beat which I thought probably was normal because of the alcohol.since that time she has not drunken anything alcoholic but at least once a day she has this extreme dizziness , headache and fast heart beat.i measured her blood pressure but everything seems to be ok. is it something serious?
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