Hello,
Stomach ache and constipation is due to acidity.
Acidity may be due to having irregular meals, outside food, extra oily or spicy food, sleeping habits, sedentary lifestyle.
Next Steps
Firstly, go for diet management, lifestyle management, meditation.
If you don't get relief you may consult online.
Health Tips
Have fibrous diet like leafy vegetables.
Have plenty of fluids.
Have meals on proper time.
Do not skip your meals.
Have something after every 3 hours.
Have adequate sleep.
Avoid spicy or oily food.
Avoid stress.
Meditate regularly for atleast 20 mins in morning.