Hello I appreciate your concern Left shoulder pain with problem with deep breath old be related to heart or long disease You should immediately consult a chest physician or cardiologist for examination and a series of investigations like EKG and pulmonary function test Bloating and acid reflux can be caused be stomach hyperacidity die to faulty dietary habit or hiatus hernia I would advise you to take anti acidity medicines like Pantoprazole with antacids Avoid fatty fried spicy and junk food or carbonated drinks Refrain from smoking and alcohol Have lots of fluid orally you should take more of fruits and vegetables in your diet Hope this helps you Thanks for using our services Best wishes