What Causes Chest Pain In Left Pectoral After Double Bypass Surgery

i have had this problem since 5 months after double bi pass surgery , a chest pain alongside of my left pectoral . I have been in the hospital numerous times 7 x this year alone . They put me in observgation run test ( x-ray, cat scan , stress tes, eco ) etc. Luckily they say it isnt my heart . I cannot burp, no longer does soda or carbonated water work, nor does gas x. I have seen my pulmanologist , who even though i smoke says i have mild copd and for a person smoking 30 years my lungs are actually good. gateronoligist has done 2 endoscopys and a colonoscopy wiothin the past 2 years . They see nothing . To relieve the pain , i drink a few beers , it takes the pain away for 3 days but then comes back, it is the only thing that relieves the pain . I dont want to drink because i am a diabetic as well. The problem is the pain goes away for a few days, but then i get the dry heaves and cough out phlem , which i do only after i feel like i am choking . The pains in the chest i get are sharp and since so close to my heart , i rush to the hospital. In the same year before my double bi pass, i was on a respirator for 9 days with conjestive heart failure, so i dont take chances