Hello, Thanks fro the query.
Frankly being as Doctor I would like say one thing we need 1500-2500 calories per day according to our work condition, work means here physical work not mental ( brain).
You know biscuits a packet is full of energy and calories so they will definitely produces gastritis
and fullness in the stomach about which you are making complaint.
It seems that your's work don't require any physical work , so less calories and less food i.e. not more than three times.
When eats something extra , there is pain, so , why this?
If not extra food , no pain, no test ( why).
Still you eat more than this , you have to take some digestive enzymes and antacids, perhaps you would not like this.
Now ball is in your court, decide yourself.
Good luck for good health. Dr. HET.