My daddy is a triplet and my GMA on my mother side had two set of twins . So yes they run in the family.
I will be 9 weeks tomorrow as well and I also snack constantly. Snacking on fruits and crackers is the only thing that helps my nausea. I can't let my stomach get too empty or I feel terribly sick. Idk it could just be a common symptom but if twins/triplets run in your family, multiples is definitely a possibility for you.