I've Had Sex Twice, And I Didn't Use A Condom, But It Was With The Same Girl. Now My Chest And Back Are Hurting, And My Throat Hurts. Are They Signs Of HIV?

Your being a virgin previous to your sexual encounters has nothing to do with your question, first of all; if you did in fact sleep with an infected person, you can easily as contract HIV with that partner in the first encounter.  Second, this is the 5th question in 30 minutes you  have asked about having HIV and this topic - and 3 of your questions were identical ones.  It seems you might need a resource for more comprehensive information about HIV and testing for it.  These symptoms you describe could be anything, and are not particularly, in of themselves, indicative of HIV, but only a doctor and tests can confirm this.

I understand you may be concerned, but if it is causing you this kind of anxiety, I would highly suggest you visit a clinic or doctor to be tested so you can set your mind at ease.  There are clinics who will test for free, or you might go to your own doctor.  If you need a clinic, you can google "free HIV test" + "Clinic" + "YOurhometownnamehere" to find a nearby one-- or here is a link you can go to, also which provides more comprehensive info on testing and HIV: www.hivtest.org/