I agree that a UTI should not really make sense that eating makes it worse...
What is your age ?
How abnormal was your urinalysis ? Did they do a urine culture as well?
Have you had diarrhea?
Do you have pain more to the left lower quadrant or center or right side ?
Lower left side pain and pain following eating might be suggestive of diverticulitis as a possible reason for the abdominal pain..
The U/A might be red herring ...
A follow up exam with your primary care doctor tomorrow may be a prudent way for you to proceed...
I agree that the UTI does not seem to fit your symptoms..
I hope that this information is helpful for you
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Thank you and Best Regards,
Anthony Bray MD