<human>: Can you give me the gist of the text in a nutshell?

Hi AskReddit, I dont know where else to turn to, and since I love the reddit community I was hoping to find some answers. Heres the deal:

My SO has been having severe stomach issues for about a month now. She says that the inside of her stomach itches and the stomach is a little bit swollen (I can touch the outside of her belly and feel that its swollen). She also gets aching pain on the whole left side of her abdomen and sometimes the pain goes across the upper abdomen. She just told me that  she feels like the left side of her abdomen feels like its very ill. Her mornings are the worst since she wakes up either nauseous, throwing up, or aching (or all three, usually).

I took her to the hospital on Sunday Dec 27 and the doc performed a CAT scan.....everything came back negative. She did have a minor UTI which the doc said we caught it at the very early stages. Maybe it could be the UTI? Well shes been taking medicine to cure the UTI along with pain relievers but 5 days later and she still feels exactly the same. I know she should still go through fully with the prescriptions, but it just doesnt give her (nor I) any hope. 

It has gotten to the point where it affects her work and life in general. She is extremely tired every morning and in pain causing her not to be able to work. She can barely eat since it causes her to puke. The best time of the day for her is near the end of the day. We just want answers. Hospital doc said they couldnt find anything...need to go to a GI. We have...nothing either. This is ridiculous. What can it be?! Thank you in advance reddit
<bot>: SO has stomach issues such as itching and swelling as well as upper abdominal pain and pain on left side of abdomen. No diagnosis can be made after visiting hospital and GI. What can it be?