NIPS test at 10 weeks

I went for my NIPS blood test today (gender, genetic screening). I should be 10 weeks 3 days according to my transfer date and also according to my 7 week scan.

When I saw my OB/GYN a couple weeks ago I should have been 8 weeks 5 days but was measuring 8 weeks 2 days. So if they go by that most recent dating, I am only exactly 10 weeks today.

Will my blood test be accurate or will my results be inconclusive because I am not far along enough? Would I have enough fetal dna in my blood regardless of a few days off scan?

Would hate to wait two weeks for my results only to have to redo the test again!! Any insight?!