Karisma – It is not only a dream, for you were feeling real emotions which arose from fears you have.
I feel from the dream that you are a caring and feeling woman. Your love and care for your grandchildren, which you must have felt for your own child(ren), can trigger your mothering instincts with a vengeance. Being female and a mother holds with it an enormously increased anxiety about those they care for. It is normal for a mother or grandmother to look for or imagine every possible danger her charges can fall foul of, and so see all manner of things that might be a threat, and I believe that is what such dreams show. Your imagination for such dangers is enormously increased. This is natural in all mothering mammals.
So your dream is a way of giving you an extra push to keep aware of any possible dangers your grandchild might get herself into. It often helps to imagine yourself back in the dream and replay it in imagination until you manage to hold the child securely. It is a way of learning to avoid such dangers.
Tony