Constant pain on the left side of chest.

I m 42 years old male having pain on the left side of chest for the last 15-20 days ECG done was normal with a simple complication of BP that was 160/70 Can the pain be due to some gastric problem also or due u c any other reason for pain also.I have no physical activity just sitting job for the whole day.Having Hydrocephalus since birth & 2 attacks of Gillian Barry syndrome 1 st in 1984 & 2 nd in 1988 Can my chest pain also due to the above mentioned problem or do I need to consult a specialist for that.Kindly refer to which type of specialist to refer & if any test r to done then what type of tests r to be done.If possible can u also confirm according to which possibilities could be there for my pain to go longer I m having pain in my back also Can that pain is also due to the above mentioned problem If possible kindly suggest some medicine for the pain to go away & type of tests to be done