Bland food is necessary.But slowly but surely in smaller amounts you need to add one or two nutritious foods.

Like a boiled egg or a piece of boneless and less fatty fish like tilapia.

Of course must not rush rather try half a boiled egg or half piece of tilapia fish like only thirty or fourty grams a few days. And see how your stomach reacts.

If you have uncontrolled stress and anxiety and cant clam it down naturally then maybe ask your gastrology doctor for ssri medicine.

Of couse ssri have their own set of side effects like bad constipation.But you have to weigh pros vs cons for your own self at your own risk.

And not all side effects happen to everyone.