I wouldn’t worry about it. I do the same to a certain degree. Do you find yourself looking at an object and then think about how to make it better, and then go through all the details of how it could be done? If you’re really worried the only real way of getting help is through trained professionals, not people off the internet. I may not understand the problem but I think it’s normal for some people to have a mind like this as we’re all different.
You could try some form of meditation, I don’t mean the stereotypical meditation (unless you wanted to ;) ), cross legs and all that, just practising thinking of nothing, might help. Personally I listen to lots music, currently some blues (Joe Bonamassa) but anything slow and deep works for me (classical, progressive, complex guitar work ect.)
The other this is maybe a creative hobby.I've started to the learn the guitar becouse I now find my mind works on how to better my playing, which is great fun.