Frog it, ah ah ah!
I had to rip out one sleeve of my sweater. SADFACE.
I was all ready to sew it all up. I even BLOCKED IT, which I NEVER do.
And then one sleeve was waaay longer than the other, which doesn’t make sense, but whatever. I am now in the process of fixing it.
I did sew up one side and sleeve, and what I have done looks AWESOME.