mega I am so sorry for what you are going through. I went through the same as you except I had medical management so it was induced, but physically the same, just planned I guess.
Timescales and stuff, I hope this helps:
Day 1 - a Saturday - spotting in the afternoon, maybe about 2/3/4 o clock and early evening that then got much heavier in the night
day 2 - passed the sac at about 10/11am. I expected that to be bad but it wasn't, I didn't feel it, came out while I was weeing. I was pissing in Tupperware as held by DH. The only reason I knew was DH went 'oh' and I knew what was happening. Mine was just the sac, no baby hence the MMC. I found this comforting, insofar as I wasn't as freaked out as I could have been. I stopped at home this day, I was so emotional, couldn't have done anything or gone anywhere. Judging by your heavy bleeding, I think the main event will be done in the next day or two. After that it's like a period, or was for me anyway. Other people report their MC as being done within 6 hours or so.
After that, I think I carried on bleeding, just like having a REALLY heavy period for the next week, within 10 days it had tailed off. For a few days after I continued wearing panty liners, not much was coming, but enough to ruin my knickers. For these days, I was able to go out and about my normal business of emotionally okay.
Had a scan 10 days after MC, inconclusive. Had another scan a week later, in that time, no more bleeding. 2nd scan, everything had settled.
The first period was 28 days after mc (the 2nd was not as clockwork!!!! Damn my getting smug thinking I'm in working order). That period was 9 days compared to my usual 5. That first period was VERY heavy and clotty and worse than the mc at times, the flow was just so much.
I hope this helps. It is 2 and a bit months since mine. I get sad still but it's amazing how far I have come.
Will try and pop in again but do PM if you have anything you want to ask or talk about.