Feeling a vomiting sensation during lunch or dinner for 2-3 months can be caused by problems such as acidity, gastritis, indigestion, acid reflux, anxiety, or eating large/heavy meals. Sometimes irregular meal timings or certain foods can also trigger this feeling. Try eating smaller meals, avoiding very spicy or oily foods, eating slowly, and not lying down immediately after meals. Medicines that reduce stomach acid, such as Pantoprazole or Omeprazole, may help, but they should be taken only after consulting a doctor.