Severe Burger Combo Reaction - In-N-Out, Los Angeles California

9149 South Sepulveda Boulevard, Los Angeles, 90045 California, United States

Ate at this location December 18th, 2018 had a double cheeseburger, fry and diet coke combo.
About 8 hours later had severe diarrhea that lasted steady for about 4 days.
Have had severe stomach pain and on and off diarrhea now for about 3 weeks. This is not normal for me at all and have been a life long customer for years.
Did not report earlier because we left the next day (sick) for a 3 week vacation out of continental USA. | Symptoms: Diarrhea, Stomach Pain