Hi, had heterosexual intercourse once. He has had STD and HIV testing and both came back negative (I don't know if I can trust him) I had STD testing and that was negative too. I had a rapid oral fluid HIV test at 4 weeks, it was negative. I'm a little over 5 weeks now. My doctor took a bunch of blood today and is going to test it for HIV. How accurate are blood tests at 5ish weeks?