So stupid, I could cry

I made a big ugly dumb mistake. A knitting mistake, so those of you who are expecting earth-shattering revelations can click somewhere else now.
Back to what I was saying; a big stupid mistake in my knitting. Freaking Tempting II, of course. Which is my nemesis once again. I thought we'd reconciled once I finished the neck (yes, finished it this morning!), but alas, a happy ending was not meant to be.
Because I, dear reader, am a dumbass.
After the success I (finally) had with the neck, I decided to press on and kitchener stitch the armpits closed. No problem! I know how to do that. So, off I go...not bothering to look at any of it other than the stitches I'm grafting together, until I get to the end. Aaaaannnnd...voila!...wait, no! Not voila! Oh crap! My ribs don't match up. What the f***???? How can it be?
After picking out (ever UNdone kitchener stitch?? Not fun), I found my mistake. I put the sleeves on backwards. The left sleeve is on the right side of the sweater and vice versa. Now, normally this would not be a problem, just switch the sleeves, and you're back to happytown. But Tempting II is knit in the round, to the sleeves and then all the stitches are worked together until the end. So, I either frog back two skeins worth of work, or figure out some other way of fixing my dumbass error.
Suddenly, I am so, so tired.