I know exactly how you feel. I'm the same. Somedays are good sew days and others aren't. I can tell after about 5 minutes after I sit down to my machine. If I made several mistakes in a row...I've found the best thing to do is turn the machine off, get up and do something else. I usually will have some hexies or hand embroidery to work on when machine sewing isn't a good day. Hang in there...it will get better!!!