I think you should back both top tensions, back off and start over adjusting the tension. If you have another color thread i would use that ( some people have a lot of trouble with black thread ) when i got my machine i was told to set the tension for the lightest things i would be sewing and that it should be good to go on anything else. That advice has worked pretty good for the last 20 plus years. When i go from 277 to 138 i do have to tighten the top tension just a little. Most of the time when i'm sewing both the top tension and the side tension have maybe one turn. On the bobbin tension i just do it by feel. But i have read on here that some folks use a weight gauge like what you use to weigh a fish with and set the bobbin tension at one pound pull.