Those must be withdrawal symptoms, also consumption of ashwagandha has its own effects on your
thyroid hormone levels, so it's better you get them checked.
If you're planning to get rid of the dependency, try reducing the consumption over a period of a month and slowly again reducing it to one pill a week and gradually breaking the dependency. It should not take more than 21 days for you to get used to the same and get over your addiction or dependency for the same.