Thanks for your query.
Pain in chest which increases on typical maneuvers like deep inhalation, coughing, sneezing
, laughing etc is suggestive of pleuritis
which is inflammation of the pleura
which is covering of the lung usually caused due to some infection.
If you cannot afford a doctor or can't go for chest xray....may try a course of empirical antibiotic like azithromycin
...If This doesn't help , better will be to go for chest xray nad meet your doctor...