Are you able to localize the site of pain?
Did Tums make the pain better?
Any pain on bending or other body movements?
With the description, it does not seems to be pulled muscle or pain related to musculoskeletal system (muscles or joints of chest wall or abdominal wall). It is likely to be Gastroesophageal reflux disease (GERD). This can be associated with esophagitis (food pipe inflammation). You may continue with the Tums. Also take Prilosec, which is an acid blocker (available without prescription). Restrict alcohol for some time and hopefully this should subside in next couple of day. If it is persistent, it would need an evaluation by a physician and may be upper gastrointestinal endoscopy (camera exam).
Please feel free for your follow up questions.