Waiting for a natural miscarriage

I am anxiously waiting for a natural miscarriage. I thought I was about 10 weeks pregnant and then during week 8 I started spotting. I had an ultrasound at 6 weeks 4 days and everything appeared fine. I went to the doctor on Tuesday (9 weeks  4 days) and she sent me for a 2nd ultrasound and that's when I learned that the baby no longer had a heartbeat and likely stopped developing around 6-7 weeks. My dr. Told me I still have to pass the save and yolk and Suggested I wait for a natural miscarriage to happen, because it's less intrusive than a d&c or taking medication to induce. Now I am anxiously waiting for the Miscarriage to happen. I am scared, I don't know how much I will bleed, how painful it will be or when it will happen! I feel like I can't heal emotionally until the physical part is done. Had anyone experienced something similar? How long did it take, how painful was it?