NOPE. Trust me, I know the feeling. I was trying to finish up the last few blocks for the family reunion quilt I need to finish this month so I can send it to my niece so she has plenty of time to quilt it before the reunion. Like you, I'm truckin' right along, look down and no thread, doesn't matter top or bottom it happens to me a lot, especially when I'm on a roll. Maybe it's a part of the right of passage for quilting.