Looks like the symptoms are related to meals and maybe an onset of Gastroesophageal reflux disease, a very common thing nowadays. Breathing difficulty can be one of the commonest signs seen in this disorder. Advice to schedule meals and avoid oily and spicy food, avoid late night meals. Shoulder pain may be related to exercise, should go away with continuing the work out. But in case you need, you can take mild pain killers

Any other symptoms like cough fever Intermittent breathlessness specially after taking meal may be due to gastritis Shoulder pain may be explained by exercise Have you taken pain kiler