I'm so sorry for what you are going through. Believe me, I know the feeling, as I've been dealing with this for over a year now. Wonky test results with no diagnosis - only the option to spend more money on more tests - and more upset for the pup.
I wish animals could talk. I'd love to hear Bacca say: "I'm fine, Mom! My liver results only got wonky because I got into the red wine the night before!"