Who should i seek for continuous undiagnosed chest pain?

Start with PCP: You likely need a cardiologist, but start with your primary care physician if this has been going on for more that a few days. Everyone needs a primary care physician. Some people may need a cardiologist. Most pcp offices have the tools to do the first part of the workup, at least. They can refer you to a cardiologist, who will forward results of testing to your pcp.