What THE FUCK did just happen? Someone please answer my question, cause my head is about to explode...

So, let me try to get this:

1 - The Silence are aliens that have been mentioned in Season 5 (the snake thingy in the first ep. and the vampire in Venice). Silence as in species and not, as most people expect, the end of the universe thanks to the reTARDIS 'splosion.

2 - Now, are they going to be a one off species or will they be recurring like Sontarans, Cybermen, etc.?

3 - Who said "silence will fall" in season 5 with that deep voice? Was it the Dreamlord, which would mean the Doctor was aware of the Silence subconsciously?

4 - Was this the middle of the road for the Doctor and River? From now on she will know less and he will know more about their relationship?

5 - That kid. Who's child is it? Did the TARDIS impregnate Amy?

6 - Who is the Big Bad this season?