I am pretty frazzled right now. Working on a sunbonnet sue lap quilt for my mom for Christmas. My brain cannot figure out HOW you are to sew these together. EX.-After you sew the bottom sash with cornerstone on how do you sew the next piece going up the right side of the square???? My mom has stage 4 cancer, was given 6 months to live 6 months ago. She has always wanted a sunbonnet sue and sam quilt. I have 5 brothers and 2 sisters and have incorporated this into the quilt. I am sorry, my mind is all over the place. The stress to get this done by Christmas is tremendous. I have never done sashing much less sashing with cornerstones. Ran into a lot of different issues with this quilt, one of them being barely having enough of some of the material. I do not want to trim off something I can't fix. I am frantic and cannot focus. Please don't tell me to walk away and come back later with a clear head. I have done that repeatedly over the past week and still come up stumped within a few minutes of returning to the quilt. HELP ME PLEASE!