Hi Heidi.
Thanks for your query.
Read the history about your daughter and understood your problem.
It is important to know that your daughter , 14 already had nausea as per the history you have provided, so she ate vegetables.
The reason for the swelling on both sides of the abdomen and warm in the middle,
pinching pain going through left rib can be :
Loos to be
gastroenteritis with
colitis as a major problem causing the warmth and distension in the center, distension being so much that she is feeling the pain going through left rib .
I would advise the following :
First of all take to ER as the things look serious or can turn serious as the third space loss can be dangerous as your daughter is just 14 years old and a single large
loose motion and / or vomit can make her dehydrate or can go into
septicemia.
Needs admission, vitals to be checked,
intravenous fluids and antibiotics