I had a similar experience a few months ago rainbow.

I usually love getting massages and for my last bday I went to this spa that offers this "body polish" treatment that people rave about. The woman there was nice and respectful and as far as I could tell didn't touch me any differently from any other massage therapist. Maybe a bit more focus on my arms and legs. But I went into full on dissociated trauma mode. I didn't so much feel fear as shame. Really intense horrible almost nauseating shame. I still don't know why it happened and really can't pinpoint anything specifically bad about the place or the person involved.

You're not alone. I hope you feel better soon. Take the childhood exercises slowly if they're triggering you.