Chest & Breathing Problems

In january this year i had an issue where i would wake up in the morning and cough up which would have blood in it. it usually happened in the morning when i wakeup and spat. rest of the day it was fine. i also used to have palpitations, chest pain and shortness of breath when i used to lie down. but these would go away when i burped. doctor advised some xrays and blood tests which was normal. this bloody sputum stayed for a month and half and went away. "But from the past couple of days i am having palpitations chest pain and shortness of breath. also having alot of burps. and today morning i coughed up blood as well. i also have slight pain in my throat too." i have attached the picture of todays cough with blood. kindly suggest.

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