What pattern or stitch did you use? Does it have a border? If so how many stitches wide is it? What fiber/yarn did you use?
Blocking may help, but it doesn't always solve the problem. It depends on the fiber, the stitches, etc. If its acrylic you can try tossing it in the washer and dryer. That usually helps some. Sometimes getting it damp and laying it flat can help. You may need to pin those edges. You can try steaming it, but be very careful if it's acrylic ir it will melt.