Its very painful?

Dysphagia: Occasional difficulty swallowing, which may occur when you eat too fast/don't chew your food well enough, usually isn't cause for concern. But persistent dysphagia may indicate a serious medical condition requiring treatment. These can include a stricture/spasm of the esophagus or esophageal sphincter, a foreign body, scar tissue in your esophagus due to GERD/trauma or Cancer. See a Dr for exam.

Depends on severity: Any stomach flu or food poisoning type of illness can have some nausea, bloating, vomiting, diarrhea, tummy pain, tummy cramps, fever, chills, sweating, dizziness, etc... One person can have some or all of these symptoms. If symptoms are mild, they might go away in a day or two. Sometimes they can be severe or last a whole week, so a doctor's visit can be helpful.