Good day my Friend,
I can understand your concern and appreciate you for seeking help.
Yes, as you rightly identified raching thoughts or overthinking or overwhelming feeling is the cause for your anxiety. Definitely this can be handled slowly using mindset change techniques, lifestyle, dietary and few other recommendation.
If you are willing to make few changes, feel free to reach me online for further assistance and assessment of your physical and mental symptoms to recommend suitable psychotherapy solutions.
Health Tips
Be aware, every individual is unique due to their upbringing, culture, society, lifestyle, environment, food habits, education, family values etc. So there is no one fit solutions for all. General advices, Google search, youtube videos won't give better results in handling individual's emotional disturbance. You need a human touch first to ventilate your feeling and emotions and to identify the rootcause. Then suitable solutions and therapies plan can be identified jointly.
Appreciate if you can take the next by talking to a counselor/psychologist.
Go ahead and connect with any of us online for better understanding of your problems.
Be positive. You will be alright soon.