Bummer.
Yeah, doing a Kamm back for these Civics takes some attention to detail. BTDT and still driving with it. At least that's what I think. Leave it for another day.
I bet the little screw bottomed out on the wheel stud behind it. Ya can't go tightening one of those little guys with an 18" breaker bar, ya know.
I use a screwdriver-type nut driver. Not a wrench with a handle.
I think there's enough screw sticking out into the inside of lug nut to get it out with needle nose pliers. You'll find out soon enough.