How do I stop thinking about if I have done a well enough job?

Well what you do is you try to think positive. "Yes I have tried my best." Things like that! I hope I helped :D

Realize that your thoughts are based on "guesses" of the future and are not certain to be true. Its very common to worry about the future and what might happen but you just have to remember that theres millions of possibilities and anything could happen.

It depends on what job you are speaking of. Is it a job around the house, a job you are doing for someone else or a job to where you are providing for yourself or others. But the best thing you can do is to always try to do the best job that you can do and put the effort in that you know you need to. And follow up with the work you put in. Ask questions if you need.

You can stop thinking about it by doing meditation. It's very helpful for you. Try it. You will see the difference

Well, this leaves me to ask you: "what does a well enough mean, and/or look like"? And is that realistic? Your goals should be S.M.A.R.T (Specific, Measurable, Attainable, Relevant, and Time bound). If you done the above, then you tried your best! Be easy on yourself!

Give yourself permission to be content with everything you've already accomplished. Tell yourself, "I did the best I could, I deserve to be happy with myself." You can always do better tomorrow. For today, pat yourself on the back for what you've accomplished and let it go.

I wonder how it would be to feel what you have done well rather than think about it? Its all too easy to become stuck within a thinking cycle rather than feeling the emotions that are currently around for you. Maybe you cold if you feel comfortable ask a trusted friend or colleague how they feel about your work?

Compare the activity or duty to reactions in the past. Always do your best, and accept that others will also believe it is adequate.

What is your measurement? If you are comparing yourself to someone else and you have not taken time to come up with what YOU want the outcome to be, it might be time to start. Do not base your out comes on what others want and expect for your life, take it one motion at a time and try to figure out your goals for yourself and what you want it to look like. "well enough" is a construct that someone set FOR you a long time ago. Think outside of that box and discuss with yourself what you are comparing it to and if that stress is helping or harming you.