Anxiety! Human brain is the most complex thing in the universe, if you think you are ailing, you will feel so!
Most people don't have HIV, the probability of you getting infected from an one time exposure, 'assuming' she was infected at the first place, was certainly low. It's very difficult for the semen to enter through the urethra from a FTM transmission.
Unprotected vaginal intercourse with a partner of unknown sero-status does implicate testing for HIV, you can take a III /IV/V generation of HIV antibody test at this juncture to get a conclusive result.
We, here on this forum can only tell you about possibilities, just get tested now to put this behind and move on with your life. You're perhaps going to be okay. Symptoms don't mean a thing.
STOP reading about HIV on the internet, internet will give you information that's never specific to your ownself thus, it's just waste of time.
You have to ask the tester what kind they use. Both are readily available.
Statistics are mainly useful for large groups of people and you had one encounter so I wouldn't bother studying them anymore.
The best way to reduce anxiety is to have her test because if it comes up negative then you should focus on that (especially if she tells you she is past the window period) while you wait to test. You can buy a test in a drug store for her if it comes to that, since it will go a long way toward reducing your anxiety. Otherwise don't Google as GR stated. There is no diagnostic there at all, so the more you hunt, the more it will only make you more anxious.
Any time you have unprotected penetrating sex, anal or vaginal, you've risked HIV. But it is a low risk from a single encounter of transmission rates of less than 1%. Let that sink in, less than 1%. So, the odds are really in your favor that you would not get HIV from this. There is truth to the fact that having an std increases your risk of acquiring HIV but you GOT the std from this episode, correct? So, I'd be less inclined to worry. Because you've had a risk, you need to test. You can take a 4th generation DUO test at 28 days or any time after that for a conclusive result. You can ask her to test now for some peace of mind but that wouldn't mean you shouldn't test yourself. Stay busy, stay off the internet and know that your risk is extremely low.