Listen, u sound just like I did when I was worried.
You say "i think she may have said she might have aids"
dude, theres way too many mabyes in that statement. Go get her tested. Go get yourself tested. You'll see, your both negative. I had sex with a girl that was very permiscuous (40 ), it was protected. I was sooo worried for about 3 months while she and I had similiar symptoms: sever headaches, neorapathy, tightening of the throat, flu-meningitis type sickness, tongue blemishes, rashes... List goes on and on....
Turns out, my worry and her (actualy sickness) caused these things to happen man. Trust everyone when they say that the actualy risk of getting hiv from protected sex is zero, and from fingering her??! (for one man, is it possible you just noticed this "cut" on ur finger? And no, its almost again... 100% not likely ur going to get it that way). So stop worrying man, u probably had some freak out traumatic moment where u realized u had hiv, and its going to cause u a ton of worry if you dont calm yourself down, think about the realities of the situation logically. Again dude, theres not much I can say to calm u down, I know, but you should do it for your own well being.