((((((((((((( ripley )))))))))))))))
Sounds to me like you are working really hard to let go of the old thoughts and the emotions that go with them from your childhood. It takes lots of time to get to a point where you are no longer hurt by those old tapes.
Would it help you to remember Mother's Day in a different way? Maybe, instead of sending a card or having any contact, you can have a tree planted in her name, or make a donation to a favorite charity of yours in her name. Or for that matter, make the donations in YOUR name, to celebrate yourself

In this way you will have something to feel good about on Mother's Day!
Wishing you well!

sabby