"I found out something from my mummy today that someone in the family had said about me..." Sounds like Post Office to me--you know, someone said something to her, she put her own meaning on it and relayed her meaning to you, and it was negative, and it ruined your day?
What a waste! (((Evening)))-you don't know for sure what that person really said to your mom- not that your mom is lying--but everyone has their own take on what is told to them. Your mom may have felt that what the person was saying was a put down of you, when maybe-just maybe, it wasn't at all-maybe it was a put down of her? Is that possible?

Point is, you didn't get it from the horse's mouth--you got it via your mom's mouth.
And so many of us place our own meanings on what others say.

I hate confronting people-but i also hate wasting a whole day stewing over what one person told me about what another said about me.

These days I just go to the horse's mouth--I've been amazed to find out the truth of
what was really said, versus what the other person said was said.
JMO (((EVENING)))-theo