these widenings are causing due to tension and overthinking, Initially it started with tremors, in later stages it giving just pain and swelling in head. Only this information was provided by Doctor.
Divija, overthinking and tension will not cause big changes in your brain's shape. I really strongly suggest you look for another qualified doctor, maybe a neurologist or psychiatrist but even a good general practitioner M.D., who will sit down with you and take the time to do a thorough assessment or read over your existing test results, and answer your questions until you feel like you have some better understanding of your symptoms.
Thinking does not structurally harm the brain. Folia exist anatomically in the cerebellum, but relations to cognitive problems are rare. Unfortunately, the question is not precise enough to advice further in this context.