How do i stop overthinking about breathing while eating? i have messed up the natural breathing eating rhythm by being too aware of my breathing and it is making eating difficult. how do i go back to normal?

It is not feasible to provide an opinion without additional history, physical examination may be some tests. It would be prudent to see your doctor to see if you may be depressed. Depression is treatable. Counter-intuitive as it may seem, exercise may help. Start with low intensity exercise such as walking and gradually increase the intensity as tolerated. Drink more water. Wish you good health!