You are not a process knitter. Please keep that in mind when you try to cast on socks without checking gauge. All sock yarn is not the same. Hell, your needles weren’t even the same. Do not think that you will have the patience to unravel or *shudder* cut the toe of your sock to fix ANYTHING.. You won’t. Will Not. You also will not (got that) put away this yarn and move on to the pretty new blue yarn you bought in Pennsylvania. You will meekly cast on a gauge swatch (though it is okay if you want to use the untouched ball) and restart these socks. And if you’re still knitting them during finals, you will have learned your lesson.