(((Rosebud))), it isn't your fault. Not even a little bit. Freezing up and not knowing what to do, not saying stop - these are very natural reactions and do not mean that you have, or had, any responsibility. A child is supposed to be able to depend on her parents to do the right things - so in this situation there was no way you could have been at fault.
Do you think you could try talking to a counsellor or therapist?

Bluegrey