I love that pattern and the fabrics, Very Pretty :D:D:D
Your DN is going to look at her quilt, and see the love and time that her mother and you put into it. She is going to love and appreciate the fact that you finished the quilt, that her mother wanted her to have... Do a few unmatched seams really matter?
Don't worry, enjoy the rest of the construction and quilting, don't be so hard on your self (((HUGS)))