This is so relatable, though I think I hit the THIS IS TERRBL stage much earlier - maybe I could train myself out of it? (Probably not, let's face it...)

And I so know the "everyone will hate it" stage, too, alas; what helps for me is getting beta feedback, because I trust them and I know they won't let me post something that has no ending or bizarre characterization or what have you. But it's still a very tense moment.

The idea of writing and posting two separate stories at once is mind-boggling, though, my hat's off to you!