Almost a Month

So had my miscarriage on 09/17. This Saturday will be a Month since my miscarriage and no period. I took two pregnancy tests and nothing straight negative.But I’ve been having discharge since the end of September like I’m ovulating. I haven’t taken any ovulation tests. This morning I had a gush of some fluid and white cervical mucus. Really wondering what’s going on. I woke up this morning with heartburn and a lot of gas as well. How long does it take for a cycle to come back after miscarriage?