S-9 Healing medicine for the Power of the Holy Spirit

Did the fall of man only affect mankind?
Are we experiencing the Church in heaven as well as on earth right now?
What do we do if we fall into sin and not know how to get back up to God?
Is it possible for anyone but Jesus to have no sin?
Should Orthodox believers go to other non-Orthodox churches and receive communion?
Can we just confess to God in private or do we need to do confession to God in the presence of a Holy Spirit anointed Orthodox Priest?