I think the answer to all these questions can be answered very easily.

We are coming towards the Galactic alignment. You would EXPECT to see more massive gravity effects from the Black Hole at the center of our galaxy. This could explain most of it better than Nibiru, planet x etc...
As we align there WILL be more and more effect put on our solar system. This is what the Mayans were talking about in dec 21 2012. This alignment will be a max proportions.
If you doubt a Black Hole around 29,000 light years away can do this?? Consider this, it's what HOLDS our galaxy together...then add in the gravitational effect of all the other stars between us and the hole???? Yeah, it can do all this quite easily.