Yes, chest pain that worsens when bending over and in addition to other gastrointestional symptoms (burping) is usually indicative of heart burn, also known as acid reflux or gastroesophageal reflux disease (GERD).
In cases of GERD, acid from the stomach moves up into the esophagus (throat), and can cause a number of unpleasant sensations including anything from heartburn or chest pain to regurgitation, hoarseness, difficulty swallowing, feeling like something's stuck in your throat, coughing, belching, or burning in the throat or mouth.
The exact cause isn't known, and some people just seem presdisposed to having it, but other risk factors include drinking alcohol, pregnancy, obsesity, smoking and eating certain foods.
Eating small frequent meals, and avoiding any known food allergens can help. You should also avoid overeating, as this puts pressure on the esophagus and stomach and makes the condition worse. Also elevate the head of your bed 6-8 inches to decrease excessive pressure on the diaphragm, and avoid eating before to going to bed.
There are also remedies available over-the-counter such as prilosec or zantac for long-term relief, and antacids for more immediate relief. Some people, however, require more aggressive treatments and prescription medications, such as proton pump inhibitors, to relieve the problem.
Ideally, chest pain should be evaluated by a doctor at least once to rule out any more worrisome problems, such as cardiovasuclar-related disorders (heart problems, high blood pressure, angina, etc), or problems of a different nature that could not otherwise be treated, such as gastritis or esophagitis (infection or inflammation along the gastrointestional tract). If your pain is severe or recurrent, and does not respond to any of the over-the-counter remedies (pepcid, mylanta), further diagnostic investigations are recommended.
I hope this helps, and hope you have a good night!