Welcome to the forum. It doesn't matter that you didn't request me or Dr. Hook. We ignore all such requests and answer questions randomly. But thanks for your equal confidence in both of us!
The questions you ask are among the most common on this forum. Our replies are always the same: HIV is rare in women in the US and other industrialized countries, and almost completely absent at age 18. And people almost never lie when asked directly whether they have HIV or other STDs -- and certainly your partner is telling the truth. Even if she had HIV, the transmission risk through unprotected vaginal sex is quite low.
And despite what you think you might have learned by online research or otherwise, symptoms never help judge whether or not a person has a new HIV infection -- because the identical symptoms occur in so many other common, minor illnesses. In any case, your symptoms really do not sound at all like a new HIV infection. My guess is that your mouth and throat discomfort are due to all the antibiotics you have had -- maybe not to start, but at this point that's a pretty good bet. You could even have an oral yeast infection, which commonly results from over-treatment with antibiotics.
But the big mystery here is why you are sitting around worrying, or asking questions on line, when the answer to your fears is instantaneously available: get an HIV test, for goodness' sake! For sure it will be negative and you can put this somewhat silly fear aside.
From all you say, I don't blame your partner for feeling you are bugging her. It is almost impossible she has HIV and you should definitely lay off. You owe her an apology, preferably accompanied by flowers, an expensive dinner, and even more expensive wine.
Feel free to return to report your HIV test result -- but I won't have any other advice until then. Don't worry about it in the meantime; it will be negative.
Regards-- HHH, MD
oh and i didnt pick a doctor! umm it doesnt matter which 1. you both seem very professional at what you do. please and thank-you