Missed miscarriage

I went to my first appointment yesterday I was supposed to be 9 weeks 1 day but we found out that the baby stopped growing around 6 weeks. This is my second miscarriage and I’ve also had a chemical. The first miscarriage was at 9 weeks and happened spontaneously. The doctor said that it’s okay to wait and let things happen naturally but I’m wondering other’s experience on that. The baby has been passed for several weeks and just the anxiety around when it will happen is a lot. If you had a MMC how long after finding out/the baby’s passing did everything start to happen if you had no medical intervention? I’d really like to have it happen naturally if at all possible.