may be its anxiety
, anxiety can lead to such tremors and shaking or in other words nervousness
, your family background of DM has nothing to do with your hand shaking . its purely due to nervousness, every one feel nervous at some time in there lives. however some people overcome it easily some exhibits symptoms like you. i can also advice you to be stress
less, not to be intimidated easily, talk to a friend , don't keep stiff inside yourself, read good books.
i wish you all the best , thanks for writing to us.