Oh fabrichore, don't be so hard on yourself!
After a busy day at work; a long drive home; preparing dinner; washing up the dishes; etc; etc; etc; you are crazy if you think you can sit down and do some meaningful, enjoyable sewing!
What you need is some quiet time, maybe on a weekend, when your hubby can take your son out for the day to give you some quiet time and a badly needed break and then, maybe if you feel so inclined, you can give the sewing machine a try.
It's amazing how much more enjoyment you will get from sewing when you are relaxed and fresh.
Make "sewing time" YOUR time and I'm sure you will achieve better results without having to resort to unpicking all your hard work.
Good luck, girl!!!