Stomach burning nausea after eating.

Dear Doctor, I am suffering from heart burn, stomach, burning sensation. Slight Chest pain. Muscle pain. Nausea from 11th January 19. I have low to normal BP. I was having High BP 140/89 earlier. I was taking medicine Tazloc H 40 mg. Now I take Cetrizen for Urticaria. Montek AB,  Formoflo and Asthalin rotocap for Asthma. Master health check up done 6 months ago at Aarthi Scan report is fine. ECG taken on 25th January 19 is fine. I met Cardiologist he gave me Eritel CH 40 mg and Tazloc 40mg but I stopped it due to low BP. Neurologist has given me Topaz 50mg, Emikind MD, Nexito plus for giddiness, headache facial numbness and numbness. Gastroenterologist did Endoscopy for me now on 31st January 2019 report is fine. No ulcer. My question is why am I having throat irritation, stomach burning sensation after eating food reflux, feel like passing motion, Nausea. Dry cough. After half hour of eating food these symptoms become go away ???