Maybe I am mental

Twice, I was told I am not mentally stable, from two different persons. Am I? Are there more people think I am but are too polite to tell me? Has the betrayal traumatised me that badly? I know physically I was badly trashed but am picking up slowly. But mentally? Now I am afraid, what if I really have? What will happen? But I am happier now, so I should be fine, right?