Your feelings are yours, and they are valid. No one has the right to tell you what you should or should not be feeling (not even yourself). In mindfulness practice, one of the first lessons learned is the art of acknowledging and noticing your feelings without judgment.
For instance, instead of getting upset with yourself because you feel you’re overreacting to an insensitive joke, tell yourself: “I acknowledge that I feel angry,” or, “I notice that I’m feeling upset.”
Acknowledging your feelings not only validates them but limits the negative self-talk you might be having about what you’re feeling. And if someone else tries to tell you your feelings are “wrong”? Well, that says more about them than it says about you.