I agree Mrs Wright, it's likely as simple as rethreading your machine, top and bobbin. If I may make a suggestion for the future. Cut yourself two blocks of fabric, about ten inches or so and a block of batting, sandwich them together keep this to use to test your machine before you start quilting on your actual quilt. That way you don't ever have to rip out! It gives me an opportunity to check my tension and make sure my machine was threaded correctly.