So (ignoring unicode for the moment) you can send a message of 35 * 153 = 5355 characters via the Clickatell API. If you are sending unicode characters (which the OP is not) the character count for a single message is 70, reduced by 7 characters for each segment in concatenated message or 63 * 35 = 2205 unicode characters.
Lung-related causes. Many lung disorders can cause chest pain, including: 1  Pulmonary embolism. 2  This cause of chest pain occurs when a blood clot becomes lodged in a lung (pulmonary) artery, blocking blood flow to lung tissue. 3  Pleurisy.
Chest pain has a variety of sources, and virtually any structure in the chest can cause pain. This includes the lungs, the ribs, the chest wall muscles, the diaphragm, and the joints between the ribs and breastbone. Injury, infection or irritation to any of these tissues can be responsible for chest pain. Occasionally, pain can be referred from another area (such as the abdomen).