I understand OP, I've been overseas for years, and can also get my own bloods done. However.
I would never get such specific bloods don't without also getting a full general panel done. When you present these to the doctor, they'll just have to go back and get the others.
I, too, would immediately be thinking of parathyroid. Everyone is supposed to have 4 of them, and usually there are 2 just each side of the thyroid. Having said that, they can end up anywhere between jawline and heart. I had mine going bizerk almost a decade before diagnosis, and yes, it was only tested because I took matters into my own hands to a great extent.
The physician was wanting to wait and see. The surgeon I went to ordered next level tests (ONLY because of my results and symptoms, they still have to be there), and clearly there was something there. I ended up having 3 of the 4 glands removed, and it saved my life.
Bottom line, yes getting on with tests can be helpful, but I wouldn't do it if you have no medical background at all, because you need context.
In this case, you've gone straight to kidney function, because you've had kidney stones. I see why, but it's a bit like checking the electricity supply is working properly, because you've had an electric shock, when actually is because iron you were using was dangerous. Dyswim? You're looking at the wrong end of the problem. You need to look further upstream.
No idea if any of that helps.
If you feel you want to do something useful, you could have a look at lists of symptoms and see which seems to match your symptoms the best. There a lot of overlap, and most people have some symptoms, not all of them.
I'm not going to berate you for trying to help yourself; in any other situation you'd get credit for it. But generally you're going to end up spending money, getting worried, and it won't necessarily help.
Good luck!