Husband died in dream!

So last night I was dreaming about me and my husband. Then out of know we're he is killed at his work in my dream. Usually I can tell a dream apart from the real life. But this time it felt so real. It felt as real as when my grandmother died. Idk what this means but I woke up in a panic and I look beside me and he was still there asleep. but he was woke up cuz I had screamed and cried! What dose this mean? I can't lose my husband!