Thanks for posting your query.
You may have gastritis
(acidity problems) as symptoms mentioned by you along with your primary disease anxiety and deprresion.
You should consult with physician and gastro-physician and go for endoscopy
Although your mentioned symptoms may be due to functional dyspepsia
but before labeling it as functional, endoscopy must be normal.
What is your type of headache?
What are other associated features along with headache?
Is there any running nose/ tears from eyes?
There are 15-20 types if headache have been defined and excat diagnosis is made on history basis.
You should also consult with neurologist
and should go for CT/ MRI scan if needed.
Your symptoms appears least correlated with colon and gall bladder
Dr. Mayank Bhargava