If you have holes in knitting where they shouldn't be, there could be a couple things. You did an accidental YO, which you can fix by dropping down the sts above it, you dropped a stitch which can be fixed by picking up the st to the current row, or you picked up your piece in the middle of the row and knit the wrong direction, which has to be ripped out to that point.
You don't have to rip all of it out to start over, look at the videos for Fixing Mistakes on the Tips page. It's much less frustrating when you can leave at least the start of your project unraveled instead of beginning over again.
It's also good to put the knitting into a 'time out' to let it think about why it's being difficult...
