I'm worried about an esophageal rupture. i would feel pain, right?

Absolutely: These days the most common cause of an esophageal rupture is during medical procedures such as endoscopy. When a rupture occurs, food or fluids leak out of the esophagus and into the chest. Symptoms include mild to severe chest pain, nausea/vomiting, fever, difficulty breathing, etc. If you had an esophageal rupture you wouldn't be on the computer right now, you would be on your way to the er.

Usually: Also can have shortness of breath, fevers, pain with swallowing, difficulty swallowing.

It's a big deal: Common causes are complication after an upper endoscopy, or after retching (usually after a big meal), sometimes in bulimics. Stomach contents and mouth secretions/bacteria are noxious stuff in your chest/mediastinum. People get sick-pain, fever, shortness of breath, and more.