What Causes Chest Discomfort With Shortness Of Breath In A Diabetic Hypertensive Patient?

Question : Hi Doctor. Kindly do read through the medical history and current medication column to get a background of the patient. Patient has been a very heavy drinker and tobacco consumer for the last 20 years along with having a very volatile mental nature/thinking (ex. Occassional yearly bouts of continuous heavy binge drinking for 4-5 days without consuming any food till the patient reaches a stage of hospitalization, tends to overthink and take too much tensions for small things, anti-social, very negative and pessimistic outlook towards life, sleeplessness in absence of alcohol, tends to shout and remains irritated, refuses to listen to doctor and family's advice). Patient has occassionally tried to quit alcohol permanently but has failed due to lack of self-control after 2-3 weeks of trying on 3 occassions till date in last 4 yrs. Offlate since last 15 days, has experienced attack/fit of sorts for 3 times which has lasted for around 25-30 mins with following symptoms - breathlessness, heavy breathing and sweating, heavy coughing with no discharge, feeling of vomiting with no discharge, pain/heaviness sensation on left side of chest, blockage of left nostril.
Kindly advice.

Sure. Thanks Sir! Could you also please recommend a good and reasonably expensive cardiologist in XXXXXXX (U.P.) ?