Hello ,Thanks for the query.
occurs due to number of reasons related to
*Psychological reasons like anxiety ,stress ,depression etc
*Cardiovascular reasons i.e. angina pain
*Respiratory reasons like pneumonia,TB etc
*Gastrointestinal cause like hernia dyspepsia etc
*Chest wall problems like osteoarthritis
These are no of reasons for chest pain .You should get a good doctor and ask him for all the diagnosis done.Abnormality related to spllen can be seen in abdominal X-ray
,CT scan,Ultra sound
Good luck for your health.