It may just be a sign of stress OP.
When my DD was 9, we had just enrolled at a new school. Everything was very different to the old school. We thought DD was doing well, but she felt a classmate was picking on her. She also worried about losing sports kit as the school insisted on a lot of items including three separate lots of footwear, two pairs of shorts, three tops, long socks, short socks and tracksuit.
I was alarmed when she told me she'd been hearing voices and it worried her.
I was ready to go to the GP, but appointment were hard to get.
A quick internet search suggested stress. So I told DD that she was absolutely right to tell me, not to worry at all, that it was a really common thing and the GP would probably be able to sort it out very easily.
I said I would speak to her teacher about the classmate (I did).
I said not to worry at all if any sports kit went missing as it was a crazy amount to have to look after and I could never have managed without losing a few bits if I had been in her position.
Amazingly, once we had had this conversation the voices completely stopped. So we didn't go to the doctor. I monitored the situation for a few months. But as she relaxed and became more confident, the voices didn't return.