What is the omen of your mother's suicide by jumping into the river?

The first analysis: this dream was created by your own subconscious mind, which showed you your mother's anemia and dizziness in a subtle way.

The point here is your "mom wants"

I think if your mother says this in this song, it's actually a psychological contrast with you.

The second analysis: suicide is a way to end troubles, symbolizing the end of all troubles.

Dreaming that someone else committed suicide shows that you are worried about the future.