Kalli, I don't know on anything related to provera. I am sure Nona or Lenore will answer those.
1) I would not let yourself have a period. Go straight to Necon without the sugar pills or the month on the Yasmin si basically a waste.
2) I would say for convenience sake 3 3x a day is best. That and you are actually getting 90 mg instead of 80
3) taking dom with meals works well.
6) It may not be having much affect at all with just a small amount of nursing.
7) It will not hinder your success.

8) I don't believe any part will hurt him but like I said I don't know about the added provera.