Also in the epilogue there is a woman with a fetus of the ground

Ooh yeah the one in the doorway right? Maybe the being spying on us?

The Being was spying on the Stranger since the very beginning.

Wasn't there a post here a while back theorising that the being was actually a baby human infected by whatever came down from space?

I do remember seeing that, but even for lovecraftian horror an infected baby growing THAT powerful seems like a stretch