I'm a rather new knitter, and I made a mistake and I haven't found any suggestions on how to correct it. I'm knitting a scarf in stockinette stitch (with garter stitch borders so they don't roll--yeah, I've already made that mistake already), and I messed up so I un-knitted a couple of rows. When I went to re-knit them, what should have been a knit row ended up looking like a purl row. In short, the stitches I make turn out looking like they're backwards! I've tried twisting the yarn, but that doesn't seem to work. Can anyone offer suggestions on how to fix it, recommendations on what not to do again, or a big box of Kleenex?