Hm, well, I am not sure anyone can insist another person gets an HIV test. Why don't you just take one? I sincerely doubt she has HIV. A one time experience like she had is less than 1 percent chance of transmission. So, it's really pretty improbable. My recommendation is that you just get a test for yourself.
She should ask her doctor if the test was for hiv and find if it was a duo which has a 4 week window because any other test window is 12 weeks. If her unprotected was before the window of that test then she is conclusively negative.
Alternatively, if her unprotected was before she started relations with you then she can take any test including over the counter test now for a conclusive result. Unless she tested conclusively at her doctor's, you will always have this fear of her possibly being positive hanging around so there is no reason for her to not test. Your post does not explain if you asked her already, but in these times it is unreasonable for someone to not test before she starts having unprotected vaginal or anal with you. Oral is zero risk, btw.
If you test now, it doesn't prove you won't get it from her next week if she is positive and you continue relations so I don't see the purpose in going that route.