I know about switching needle sizes to increase or decrease stitch gauge, but how do I fix a row gauge? The pattern calls for 12sts/20rows in a 4" square. I get 12sts/15rows. I know row gauge is not always important, but much of this sweater is done by number of rows, not actual measurement, so I'm a bit worried. Will I be able to fix such a discrepancy when I block the sweater? Should I be adjusting the pattern to match? Should I be stretching out the gauge swatch until I get the right count? How can you fix the height of a stitch? I don't mind a longer sweater, but I don't want the waist shaping to be on my hips!