More than happy to receive an email from you and take a consult. The large strokes of your history you’ve already given and whilst there is a lot of other information that would be useful for general picture (age, sex, family history particularly as it relates to bowel/GI issues, specifics of timing and actual dietary changes etc) it doesn’t overly change the story which is that further investigation is highly warranted and necessary for a definitive diagnosis to occur (even if underlying pathology is benign). Sorry I can’t help further, the unfairness of the US health system is beyond my comprehension