Noted the history related to multiple problems that you have mentioned including depression, migraine and symptoms related to loss of appetite, nausea, diarrhea after food and suggestive of GERD.
All these symptoms seem to be related to each other.
Diarrhea after food and nausea indicate that you may be suffering from a condition called IBS that is irritable bowel syndrome
along with GERD that is gastroesophageal reflux disease
I would advise you the following in such a situation:Consult a Gastroenterologist
for clinical evaluation and investigations as follows:
tests of stool for three days.
Tests for CBC, thyroid review, liver and kidney function.
CT scan of abdomen.Colonoscopy
and Upper GI Endoscopy.
All these will lead to a specific cause that can be treated.
But if all the investigations are normal then this is to be treated as IBS with GERD.
Control of psychological problems is a must.
Take a PPI like Omeprazole.Domperidone
for nausea and GERD.
Antacid when on empty stomach.
Symptomatic treatment as per the follow up symptoms.
I have answered your query. Let me know if I can assist you further.
Dr. T Chandrakant,