I had a nightmare about my mother last night.

The question is not whether there are bad omens, but whether you believe that dreams can predict. Pay attention to evidence in everything. A prediction given only once can only be said to be a coincidence. If there is a connection, it may be because you gave your mother a psychological hint.

I think your second dream is more about what happened after the first dream. In the second dream, you reminded your mother to be careful, and as a result, her mother was still injured, just like what really happened. So, in this dream, you just tell yourself once again that mom needs to pay attention to your own reminder. This dream is not a prophecy. I hope you can relax.