Can anyone on here reassure me that I will get accurate results on this test with sending in one vial of blood?

I had this test done today and the nurse had a hard time finding my veins. I ended up passing out in the middle of the blood draw and they only got one vial instead of the 2.

They told me they would send it in anyway and would be calling me within 10 business days.

I’m just nervous that the test will not be valid or results will be incomplete.