it sounds like the fabric puckered from the washing and the batting shrunk. I would try spraying with best press and iron to see if that would help. I have a quilt that my grandmother made over 50 years ago and when my mother was in the nursing home they washed it and it has puckered. I don't use the quilt as it has gotten thin because my mother loved to rub the quilting stitched which were hand quilted and I just use to show in my bedroom with grandma's braided rag rug, her wedding picture and a few other antiques.