What are possible causes for pain in the stomach? 
human
I’m not a doctor, but I can provide a few options to consider:  -Viral gastroenteritis is an infectious cause of stomach pain that often comes with vomiting and diarrhea, which you can confirm with the family doctor.  -Gallstones or other biliary issues can also cause stomach pain, and is worth confirming with the family doctor.  -Reflux is another possible cause. It’s common to have at least some reflux, but severe symptoms such as chronic pain, choking, and difficulty breathing should be seen by a medical doctor.  -Bowel obstructions, which is a serious and uncommon cause, is also something worth looking into. 
assistant
It seems chronic, usually happening in the late afternoon until evening. It's been happening for a week now. 
human
Chronic means it's been happening for a while, often weeks to months. There's a lot that could cause it.  I've listed some of the most common causes here.   Causes to Consider A food allergy (like lactose intolerance) Bacterial or parasitic infections Bulging of the stomach muscle Gallbladder problems Gastroesophageal reflux disease (GERD) Gluten sensitivity Helicobacter pylori infection (H. pylori) Hiatal hernia Non-ulcer dyspepsia Peptic ulcer Pelvic inflammatory disease (PID) Poor diet Pregnancy Ulcers (duodenal and gastric) Urinary tract infection (UTI) 
assistant
Definitely not pregnancy. Also tested negative for UTI. 
human
Is it possible that food allergies or sensitivities could be affecting this? 
assistant
That's a possibility. I should note that it seems to only cause vomiting, though that has only happened the first few days. No diarrhea, fever, or any other kind of symptoms - just recurring stomachache. 
human
That's unusual. If you think of any other symptoms you should tell me, as it might be worthwhile to consult a doctor. Do you want me to walk you through some more possible causes? 
assistant
Yes, please. 
human
For stomach pain, the first thing to rule out is a bacterial infection.  The symptoms of a stomach infection are fever, vomiting, and diarrhea, which you have ruled out, so we can rule those out.  When you were first experiencing this pain, did it have any relation to eating specific foods?
assistant
What are possible causes for pain in the stomach? 
human
I’m not a doctor, but I can provide a few options to consider:  -Viral gastroenteritis is an infectious cause of stomach pain that often comes with vomiting and diarrhea, which you can confirm with the family doctor.  -Gallstones or other biliary issues can also cause stomach pain, and is worth confirming with the family doctor.  -Reflux is another possible cause. It’s common to have at least some reflux, but severe symptoms such as chronic pain, choking, and difficulty breathing should be seen by a medical doctor.  -Bowel obstructions, which is a serious and uncommon cause, is also something worth looking into. 
assistant
It seems chronic, usually happening in the late afternoon until evening. It's been happening for a week now. 
human
Chronic means it's been happening for a while, often weeks to months. There's a lot that could cause it.  I've listed some of the most common causes here.   Causes to Consider A food allergy (like lactose intolerance) Bacterial or parasitic infections Bulging of the stomach muscle Gallbladder problems Gastroesophageal reflux disease (GERD) Gluten sensitivity Helicobacter pylori infection (H. pylori) Hiatal hernia Non-ulcer dyspepsia Peptic ulcer Pelvic inflammatory disease (PID) Poor diet Pregnancy Ulcers (duodenal and gastric) Urinary tract infection (UTI) 
assistant
Definitely not pregnancy. Also tested negative for UTI. 
human
Is it possible that food allergies or sensitivities could be affecting this? 
assistant
That's a possibility. I should note that it seems to only cause vomiting, though that has only happened the first few days. No diarrhea, fever, or any other kind of symptoms - just recurring stomachache. 
human
That's unusual. If you think of any other symptoms you should tell me, as it might be worthwhile to consult a doctor. Do you want me to walk you through some more possible causes? 
assistant
Yes, please. 
human
It's very rare to have just vomiting without any other symptoms. Sometimes doctors call it  vomiting syndrome.   Vomiting Syndrome Bulging of the stomach muscle Gastroesophageal reflux disease (GERD) Hiatal hernia Non-ulcer dyspepsia Peptic ulcer  Also worth considering are issues with the liver or gallbladder, which is an organ that makes and stores bile.
assistant