It just looks like some of the seams got a little narrow. That's okay! It has happened to all of us at one time or another! Just lap the side with the most fabric on it over the other side, then hand or machine stitch over it. If you want to really cover it and don't have any more fabric, just remember that all fabric in a quilt usually doesn't come from the same line. You could also use bias tape or rick-rack to hide it. There are bunches or creative ways to cover our booboos. You did well for a beginner. Just keep it up!