Apollonius I recognise your experience all too well. *OK* You said...

Right now in my life I'm swung/alternating between the 'realness' of 3D and the ultimate reality of pure consciousness. The density of this physical reality seems almost to drag me into the gutter.

Let it drag you into the gutter - yet still find pure consciousness. Especially be in the gutter. Because that's where you'll really find the pearls of wisdom. You said...

"I occasionally slow down my breath to the point that I hardly have to breathe at all. Than I stop with that because something in me is afraid my physical body will die as a result of that.

This is exactly the place where you make a choice: are you merely physical? Or are you a spiritual being? You also said...

I have also been dealing with astral abductions by the greys and learned how to surrender in the experience instead of resisting.

It's time to stop them. They don't serve you. When you know your pure consciousness inside yourself, even in the midst of a potential abduction experience, when you're 'right in the gutter', instead the tables turn, you return them to the light - whole fleets of them! "Rise Up O Lions and shake off the delusion that you are Sheep!" Open *OK*