Hi, practo user,
It's always safe to avoid outside intake that carrys various types of infection through hands to mouth, resulting the problems, you are facing at the moment.
Next Steps
Your irregular lifestyle and diatery habits affect your digestive system, causing acid reflux, Gastritis and diarrhoea like symptoms with burning anus.
Health Tips
Consult on practo for a faster recovery, till then take homoeo medicines under lying :
@pulsatilla30ch 5 drops x3.
Tke, care.