Thanks for asking. If you stand for long, your legs would start  aching. Similarly, overthinking a lot would cause a headache. Worrying would lead to low mood, and excessive worrying may lead to persistent low mood state i.e. Depression. Unfable to control thoughts is a system of anxiety problem. Consulting an experienced Psychiatrist/psychologist can help you a lot. Hope you find this helpful. For further queries you can reach me directly at practo. Regards