Yes, you can, you've already done a lot of the groundwork. This vow/promise you made at 9/10, how does it serve you? That might sound like a strange question but does it protect you in any way?
Say out loud:
1. Whenever I do well, especially when I go out of my way to do really
well, all I deserve is a kick in the teeth, while someone else gets my
reward
2. I'm a bad and stupid person
3. It's only me, a person of no importance whatsoever
Rate each one on a scale of 0 to 10, 10 being true and 0 being false, how do you feel when you say them, where do you feel it? Use these answers in your tapping.
Picture your mother saying "oh, don't be so stupid", how does it make you feel? you could picture her in chair facing you and you saying all that you want to say in response, or you could get a photo of her and tell her exactly how that made you feel when she said that. Are there other events where you felt this way with your mother?
Write down every single event that supports this vow and beliefs and start tapping on each one. You could start with the incident you mentioned in your post when you were 9. Be specific and treat all the aspects.
Try also working around the theme of deserving and feeling safe enough to do well and be your best and just be you. If you say:
I deserve the best life has to offer
I deserve the best just for being who I am
How true are they? Do you hear any objections, what are they? Tap on any. Say:
I feel safe enough to do well
It's safe to be me
Again, tap on anything that comes up.
Noreen.
Noreen Barron M.A. EFTCert-I
EFT & Emotrance Practitioner and Hypnotherapist
http://energyandintention.comEFT Blog25 free EFT scriptsYou are searching the world for treasure, but the real treasure is yourself - Rumi