I found out that my girlfriend has cancer and she and her mom didn’t tell me nothing.
Dreams about cancer generally symbolize fear, change, and uncertainty. Such dreams often reflect concerns about losing control, losing someone or something important, or facing a major health crisis or challenge.
In this dream, the fact that your girlfriend and her mom did not tell you about the cancer signifies that you feel left out of important decision making or that they are keeping important secrets from you. This may suggest that you feel anxious in your waking life about a situation in which you feel excluded or inadequate in your ability to handle a difficult situation.
Alternatively, the dream could also mean that you fear losing your girlfriend to a health issue. The dream could potentially be a sign that you should spend more quality time with your girlfriend and strengthen your bond with her.