Is it Slander if it’s the truth?

I got to thinking the other day about the words slander and defamation...
I know that some family members of mine would freak right out knowing what I write here but I also know that I’m the one that has had to keep the secret. I know first hand now what happens to people that keep secrets and it’s not pretty. I’m not interested in going back to the hospital just because my brain is not wired like normal people. It’s not my fault that the only person I bonded with for nine months decided to disconnect from me when I was born. It’s not my fault that I wasn’t wanted but unfortunately my baby brain says it has to be my fault. Why else would my mother not hold me when I was born. My baby brain is stuck in the continuous loop of being unwanted. I struggle with allowing anyone in my bubble.