What is causing the back pain with my food poisoning? I'm on day two. Felt nauseous all night the night before last. Had diarrhea at 5:30 am, 11 am, and again at 4 pm. Sipped 7UP and water through the day and it stayed down and went through me. No fever, but intense chills (oversensitized nerves), and a crampy tight stomach. Finally threw up at 8 pm and saw my lunch from the day before (as suspected - the salad I think was the culprit) but not the dinner I ate after it (which seemed to pass through).
Now it's day two and the chills are gone, no more diarrhea or vomiting but my mid-to-low back really feels tight and painful in certain positions. Stomach is still sore/tight but no nausea. Still sipping clear liquids. !The back pain is the worst part now! It feels muscular, not internal, and goes away in certain positions with deep breathing. Any idea what's causing it or what to do about it? Thanks.