How do we know if we have rabbist from dog?

when im high school our dog beat me in my hands, no one knows about it.i not ask a doctor i almost forgot about that but some one told me if once i got the rabbist if no happen within 7 days it could be 7 years and that 7 years is this year,, hmmm if i have rabbis from dog what is the sign? and what would happen in me?