I think you just need a little mental break from cycling. You are working hard and you were prepared for your ride--just didn't have it all going at the same time.

Would you feel better riding solo for awhile? Or cycling in a smaller group of ladies who want to just enjoy the ride?

Sometimes you performance will suffer during your monthly cycle and during a full moon. Don't know why, but it happens. Just remind yourself why you enjoy cycling and while you ride, take in the spectacular scenery and fresh air. And know that you are not alone in this. I had a bad ride not too long ago too.