The fact that despite double spacing after each period, my blog editor (and web browsers) forcibly removes a space so there’s only one space left. Because you know, that’s the CORRECT way to end a sentence and begin a new one.
No seriously, this is the kind of thing that stops me dead in my tracks and keeps me up at night: looking at my content and deciding nobody’s going to read any of my crap because there’s only a single space after my periods now.
Really, I’m this paranoid. I don’t know how I got this way, but I blame women somehow. And Jehovah’s Witnesses. But mostly women.
Frick it, I’ll find a way to live with it.

Put several periods between sentences. I do it all the time. Make them all phrases. breaks up the text that way, which is what you want? No one cares too much about punctuation, anyway.
Yeah I need to stop worrying about my period placements. It’s just me being Annie McAnal again.
You could be right about women. They might have done it. An incessant urge to tidy things up. (at least if Mrs Sheepandgoats be any guide) Though it could be men, too. But not Jehovah’s Witnesses. One period, two periods, three…..it’s all the same to them.
LOL, sounds like the makings of a new song (one period, two period, three period, four, say period once more and I’m out the door!)