Hi Nicole!
My son will have one of these enormous vomiting sessions at least once every other week at bedtime. Sometimes he just doesn't want to go to bed and as soon as I put him in the crib and leave the room, he starts crying and stands up and projectile vomits all over the room. I don't worry too much about those episodes (except that the clean up sucks).
However, since she is also getting over a cold and this has happened several times in just a few days, I think you are making the right decision to check with her doctor. It is possible her cold has developed into a secondary infection that needs to be treated.
Good luck!
L.