@tkol123,
If you haven't been tested within the last 6 months yourself and have had unprotected sex with a partner with an unknown HIV status, your status could be questioned also.
If she was a drug user but didn't share a needle that is not risky behavior.
She needs to tell you if she has been tested for HIV in the last 6 months and what the status is. It might be that there's no issue. BTW, there are other STDs besides HIV. Do you know what her stauts is on that and what is your's?
I suggest you read over the info at the CDC link I posted for you. They're the medical experts.