To the original poster.
First and foremost.
You have my sympathies.
Secondly.
Gaslighting apparently doesn't have to be intentional or deliberate.
(But yes, there are some doctors and nurses who do seem to be probably doing it on purpose. 🙄

Thirdly. Can you go to another urgent care facility or is there only one available in your area that works with your insurance?
(Just a question. And I think that there are currently only two that work with mine. And one isn't generally very helpful, and the other is one which bills two copays for one visit. Sigh. 🙄