Forgot this - - for some reason one of my bobbins went bad. Had used it before but the bobbin turned out to be the problem. I know this is very disappointing. Hope you get it figured out.

Updating. Yippee! I think I fixed my stitching problems. The mechanic said to check the bobbin case, as sometimes when they are dropped they fall on the top section and bend in - no longer a circle to take the bobbin. All I had to do was pry open the casing in that spot so the bobbin didn't catch when the thread was pulled. And to think I nearly threw away a couple of bobbins because I thought they were warped.
Just letting you all know in case you have the same issue.

so glad you found the issue! And thanks for letting us know what it was. Will file this info away for future reference.

Isn't that great news - glad it was a simple fix!