which test to get if only can afford ONE thanks

[Guest guest]

Hi, I have not been able to afford any tests at all in over two years.

I am wondering if I can afford ONLY one test, which one should I start out with?

(thyroid, cortisol, or ferritin?)

I'm wondering if I should start off with checking ferritin? I mean I can afford

ONE only in the next few weeks... and if I get ferritin test, can it be

ferritin only or does it have to be the whole iron panel?

Of course I hope to be able to get everything tested, but finances are

unbelievably unavailable at this time... So I'm wondering the order to plan for

if I can afford one at a time, every few months hopefully.

Thanks!!!