Hello
I appreciate your concern
Look at your description it seems that you might be having Acid peptic disease like
gastritis or peptic ulcer
It's very common with all those who works in night shift
Another possibility is liver and
Gall bladder disease like
hepatitis or gall stone
Since it has been since 2 weeks so I would advise you to consult your doctor or gastroenterologist for examination and a battery of tests like blood for
Hemoglobin, CBC and liver function test and an
ultrasound or an endoscopy if need be.
Meanwhile please follow these guidelines
Avoid fatty fried and spicy food or carbonated drinks
Have fruits and vegetables in dinner
Avoid smoking and alcohol
You should take.lots of fluids including fruits juices and water.
Avoid stress and anxiety , just relax and enjoy your life
If it doesn't improve you should change your job
Thanks and regards