Period after Miscarriage

So I miscarried back in July and have been trying to conceive since I got cleared in August. My period came right on time in August, and then maybe two days earlier than “on time” in September. This month I was 10 days late! No positive tests at all. Has this happened to anyone else? Is it normal for periods to be erotic three months after a miscarriage?

I think the trauma is telling me I’m miscarrying again - but I would have had a positive test already, right? And I didn’t feel pregnant. So that’s good.