thoughts on std testing!

So I have my first appointment next Friday and I want to refuse the std testing. I just recently got tested about a month ago and also a pap and it was all negative. I trust my hubby and I know we have nothing to worry about. On top of that, I have low blood count and I have passed out a lot and am even on the do not donate list for blood donations. Do you think the doc would allow me to refuse? I want to have as little blood taken as possible so that I can assure my own health as well as babies.