8mm module in lower esophagus found from a endoscopy. i also have a hiatal hernia.. do i have cancer? i'm 23 and relatively try to be healthy.

Probably not: Especially at your age, most often these are little benign tumors, but it's your physician's job to decide. Esophageal cancers usually look nasty and a physician will be suspicious. Ask whether a biopsy was obtained. If so, chances are it will come back benign from the lab. If your physician didn't think it was worth biopsying, it's almost certainly benign.