You should have been tested much earlier in the process.
I've done several 24hr pee tests, where you "throw-out" the first pee of the day, and then pee in the same bottle all day, and turn it in the next morning. I've also done all sorts of "regular" pee tests, where you pee in a cup (and hope not to splash oneself...), put the cup (or bottle) in a little doorway, that the nurse or tech then takes to the lab area. Both have their purpose, with some docs "poo-pooing" the 24 hour test, but that's the one that my old hematologist used several years ago, and then said "because of this that and the other, you have to have lupus, along with the CVID." I've long forgotten the "this that and the other", but I am trying to get my old test results for my next rheumy visit. He only had the stuff for the docs that are in the same "group" as his, which leaves out about 1/2 of my medical work over the last 10 years. I'm trying to avoid more testing, other than the blood work, for potential kidney issues myself. Being a guy, and after having cancer and other medical issues that have involved body parts that I'd rather not have folks viewing publicly, it kind gets to be "you wanna see my xxx? OK"... second nature kind of thang. ie: Old hat anymore. You do get used to it.
"There but for the grace of God, go I."
"... His mercy endureth for ever."