I feel hung over

I ate a really large meal, and then I went to sleep. Four hours later, my blood sugar is through the roof, I'm very thirsty (I'm drinking some cold water now, and I've put more ice cubes trays in the freezer for later), my eyes are a bit blurry, and that was well, just stupid. I really do know better. I've taken my Lantus for the night, but that's a long-acting insulin. In the meantime, I'm bumping into just about every surface of my house because I'm not judging distance well and am clumsier than normal (which means I should probably go back to bed or I might break a leg; I'm clumsy enough normally). :(