I went through a brief period at the age of 9/10 of talking to men online (just chatting, no cams) and initiating cybersex with them. I would lie about my age and say I was 18. I now know, many years later, that I started doing this after I was sexually assaulted by a couple of peers that were my age. I have no doubt that these two things are connected.

It is impossible to forget what you did unless you wiped those memories completely. The healthiest thing you can do is acknowledge that it happened, but not dwell on it. Therapy may be helpful.