I had issues with swallowing - it was definitely stress-related.  Eventually, you'll relax, but it's an annoying process to get there.

I’ve had a feeling of tightness in my throat and like I have to really think to swallow properly. It’s makes me anxious when eating as I overthink everything. I find myself swallowing all day to check it and then I think I make my neck tight and tired. Anyone else have this feeling when stressed, anxious, or even just thinking about it too much?

A lot of the symptoms you are having are related to the anxiety itself.  You've had a lot of testing done from what I have read.  It would have shown up in one of those tests.  The irritable bowel is from the stress.  Everybody's anxiety is different, so the symptoms will be different, too.   

but im in high anxiety and continue to google. :c idk how else to seek reassurance

I had a urinalysis done today with no abnormalities