Welcome to the Pain Mangement Forum. I am glad that you found us but sorry to hear about your pain.
There are many possibilities that could be the source of your pain from Intercostal pain, rib inflammation or cardiac function/muscle pain. It could also be related to your GI track. You could be experiencing symptoms of GERD. There are numerous conditions that could be producing these symptoms that only your PCP can correctly diagnosis.
I encourage you to seek a medical opinion. It is most likely not cardiac related but we should never dismiss chest pain. A few simple tests and a good clinical exam should be able to provide you with some answers.
Please keep in touch and let us know how you are doing. We will look forward to your updates.