I've been having chest pain for like 3 days now. it's the sort of pain i've felt before from drinking too much pepsi. is it something i have to worry ?

Multiple: Chest pain can be a symptom of heart disease but may be may other things such as esophageal spasms, great vessel disease, respiratory disorders (asthma, COPD, bronchitis, infections), and muscle problems to name a few. It really depends on the clinical situation and other symptoms you may be having.It sounds like reflux or gastritis but if concerned discuss with your doctor.