Donated Blood Today - Was That A Mistake?

[Guest guest]

We had a Red Cross blood drive at the office today and I donated blood

like I have in the past. It's been a while since I'd given and for the

first time today I felt dizzy, sick and nauseated afterwards. That made

me think....did I just make a mistake? Would giving blood put further

stress on my body? Would it possibly throw off the blood tests that I'm

suppose to have at the doctor on Friday?

I realize this may be an incredibly stupid question...but thanks for

answering anyway

Kimberlie