Ronnie - are you talking about blood tests or doing a donation. Donations aren't recommended in pregnancy because the high volume (500ml) can deplete your iron. But normal blood test vials are only around 5 ml - so even 7 would still have you faar below the donation amount... And I'm not even sure if there's much risk so early on - sounds like you'll definitely implant after the tests. Welcome to the TWW!
darkstar: it also took me about 2 weeks late until I got bfp with ds - there is a thread somewhere on here about hcg levels in women and testing.. it was a good read
EDIT: here is the link: https://babyandbump.momtastic.com/two-week-wait/2164359-some-information-hcg-levels-testing.html