Dear Jack77~
I'd like to welcome you here to the Forum where I'm sure you would find others in the same position.
To worry over what has happened, about what might happen, and to do so in a sort of mental loop getting nowhere is similar to what I've experienced. This has been the result of my conditions, anxiety and depression too. Life was not good as a result.
If one could look at them from a distance once can see they make no sense and will make little difference, but one is stuck with them anyway.
I found I could not stop myself from doing this, in fact things were getting worse. Eventually I sought medical help. first with a GP and then a psychiatrist. I had therapy and medications and have since improved a lot.
If you are in a remote area and cannot get to medical facilities I'd suggest having a go at on-line help though the Mindspot Clinic, who are government backed and pretty good.
I would also suggest you get prepared to take action when overthinking starts again. I use a free smartphone app called Smiling Mind. This has a large number of exercises on it, each at a different level so as to cater for all sorts of people. It does take practice, but when used properly leaves on in a much calmer and less stressed state
Can I suggest you give this a try.
The other thing that realy helps is if you have someone whose judgment you really trust - I have my wife - and when I explain the problem very often can be given a different perspective to make the problem seem less
I do hope you feel like coming back and talking some more
Croix
