Milka - sorry to hear of your loss - i too had a MC july this year - its not a nice thing to go through

I cant help with Question 1 - as i didnt MC naturally i had to have a DnC

Question 2 and 3 - i was pretty fine after my DnC so my DH and i pretty much started TTC a few days later - although it was recommended that we wait until AF arrived again - i have heard that after a miscarriage (more so a DnC i think) you are extremly fertile - i think they want you to wait for one cycle so your body is adjusted to what it has just gone through and so you are emotionally ready -

i hope that helps a bit - im sure there will be other ladies on here that can help you more!
Goodluck with everything - and i hope our little angel's are all happy together as well!