I wouldn’t be shocked if Clinton were HIV positive, but this story sounds like BS. She says that she got tested for HIV every week, and that Clinton was her only client between testing negative and testing positive. Does she realize that it can sometimes take months for HIV antibodies to appear in a high enough concentration for a positive test? Most likely she picked it up from another unprotected client (or perhaps a shared needle) many weeks or months earlier.
If the immune system is already compromised, the disease course will run faster.
Which means she was HIV positive when she had the fling with Bill.
As I posted earlier, it depends on the test.
The RNA test can return positive as early as 9-12 days after exposure.
But, it's expensive. It's not clear the doctor used that test, but perhaps she could afford it.