I feel really dumb

The 3 D words for today are dumb, dumb and REALLY dumb! I bought this darling cowboy fabric yesterday with thoughts of making pillowcases for when my Grandsons come to visit. I had a great day and felt my morning was unusually productive: after skipping through some quick house chores I cleaned my cutting table off and put everything where it belonged. Turned my music on and and then sat down to sew. I'm happy as a clam humming and sewing. My fabric is all cut for two pillowcases. I used my really cool finishing foot which folds and finishes the edge of your fabric on the ruffle. Made flat fold piping, sewed pillowcase #1 all together, turned it right side out and........ AUUUUGGGG! Nooooooooo.......
My horses are running sideways :( I just can't believe I did this. I was aware that the fabric was directional when I bought it and I even knew it when I cut it!

Pleeeeeze tell me I'm not the only person who has done this before.

As for me, I'm blaming it on I'm out of chocolate! Looks like a trip to the grocery store is in order, and fast! I guess this means you don't want to see a tutorial on making this pillowcase LOL!