Welcome to the forum. Thanks for your question. I logged in soon after you posted it: most users should not expect such rapid replies!
First, congratulations for your attempt at safe sex. Too bad the condom broke, but it happens sometimes. But despite that, you can be very confident you don't have HIV. Here's why: Even though your partner likely is at high risk, it isn't necessarily so: the elevated risk in injection drug users is because of needle sharing, but not all injection drug users share injection equipment. And sexually, she may be at very low risk: if she expected or requested condom use with you, likely she does so with others as well. And even if we assume she has HIV, the large majority of unprotected sexual exposures don't result in transmission -- average once in every 2,500 exposures for vaginal sex. (Yes, it's really that low.) Further, your symptoms are very nonspeciific and are most consistent with your obvious stress, anxiety, etc and not a new HIV infection. And finally, your test results so far are very reassuring. The oral fluids test is the least reliable in this situation, i.e. until 3+ months after exposure -- a lab-based blood test is much better. But still, over 90% of infected persons would have positive oral fluids results by 1 month.
Here's a mathematical calculation you may find reassuring: chance your partner had HIV, let's say about 1%; transmission risk if she had it, 1 in 2,500 (equivalent to 4 in 10,000); and 90% reliability of your tests to date. With these assumptions, the chance you have HIV is 0.01 x 0.0004 x 0.1 = 0.0000004. That's 4 in 10 million, or 1 chance in 2.5 million. In other words, there is not only "hope" you don't have HIV; it is almost 100% certain you do not.
My advice is that you have a lab-based 4th generation (antigen-antibody) HIV test. Wait until 6 weeks after the exposure, when the negative result will be 100% conclusive. You also need testing for other STDs, especially a urine test for gonorrhea and chlamydia and a blood test for syphilis. The urine test can be done at any time; the syphilis test should be at 6 weeks. Having had no symptoms of these STDs, you can expect these tests to also be negative -- but don't take the chance.
Finally, I also recommend you see a doctor for personal evaluation and for the tests recommended, rather than self testing e.g. through an online lab service. You'll probably find personal examination to be normal and reassuring.
I hope this information is helpful and reassuring. Let me know if anything isn't clear.
HHH, MD
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