Your acidity and stomach pain could be due to over eating , limit your diet with healthy food intake , and see if there is relief if not we will need to further assess the course of your pain and find out the cause
Regarding Alfa Alfa malt that can also cause stomach pain, please do not take syrups or medication without proper knowledge, it might help some it might cause side effects for some
Next Steps
Stop Alfa Alfa, include healthy diet with limited food intake
Health Tips
limit spicy , increase water and fiber rich food include banana in diet