I just learned the same lesson as you, Alleyoup1
I started a quilt some 5 or 6 years ago, not knowing what size I would make it. I just wanted to learn how to quilt. It is my first ever bigger project. I used some fabrics that I had (not much, as I was just starting to learn)
This quilt kept growing and I kept buying some fabrics to match as I kept piecing.
I am glad that I could manage to finish the top, but since then, I buy more than a yard at one time and keep all the selvage
Thank you everyone for the link, in case I run into a similar problem in the future