Another child licked my two year old daughters cupcake at a birthday party and then my daughter immediate took a bite from where he licked. should i be worried about meningitis?

Not more than any other day. Kids in that age group are constantly touching objects followed by touching their face or mouth. One researcher cites 100+ exposures/day to random germs followed by a robust immune response. The kids get sick some, but not as often as one would think from the number of opportunities. To know for sure that kid had the meningitis germ I doubt they would be there.