Are vivid nightmares about family members dying a cause for alarm?

I'm told that whenever we have horrible dreams like this to share it, don't hide it. Several years ago I dreamt my younger male cousin got shot to death by robbers. Nothing happened. He's safe and sound, is even a father by now.

Then just 3 weeks ago, I woke up so scared and was restless during the day. In my dream, my most precious treasure (he's a toddler) and my younger brother died getting run over by a vehicle. Somehow he ran in the streets and my brother ran after him, trying to safe him but both get killed. I woke up immediately, examining things in the house even though it already has a childproof gate and locks. My toddler was safe, asleep in his crib and my brother came back from the gym, a normal day.

Is it alarming to have a nightmare like that? It was so vivid that it freak me out. That was the 2nd time I had such dream in years.

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I'm still shaken by the bad dream about my son and brother. The nightmare was so vivid. In my nightmare, I collapsed on the floor. That's when I woke up.
Are vivid nightmares about family members dying a cause for alarm?
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