Chest pain query. Problem get solved?

I'm having pain on left side of chest since long(About 5-6 years) Pain comes intermittently, lasts for a few minutes (10 mins)and at times lasts for a few hours also,took acidity tablets but no improvement.....But since last year along with left sided chest pain, I'm facing pain in entire chest,while looking up or bending down,at times even while breathing (the feeling is like something sharp pricking your entire chest)At times there is a feeling(when we check our pulse)in left side of chest...Since last few days on touching the left  lower part of rib cage I'm getting pain .Kindly tell me what I should do now... How will this problem get solved? Please reply... I've a past history of 6 gastro surgeries(3 laparoscopic,3 open)