Ok. Thank you for clarifying. You can’t get HIV in any of those ways. HIV only lives outside the human body for a few minutes, so even if there was HIV on those sheets a day before you slept on them, it would all be dead and gone by the time you fell asleep. Also, HIV can’t move under its own power, so even if there was fresh HIV infected semen that you ejaculated on top of, the HIV couldn’t get up your uninfected semen into your body.
As to your second scenario, even if you have a cold sore inside your mouth, you can’t get HIV from sharing a cup with somebody who’s HIV positive. Saliva doesn’t transmit HIV. The only fluids that can transmit HIV are semen, blood, vaginal secretions and breast milk. If you were to expose HIV to saliva, it would be destroyed in an instant. Between the enzymes and antibodies and all the other stuff that’s in saliva, HIV doesn’t stand a chance.
As to your third question, even if your hand was covered with HIV infected blood, semen, or vaginal fluid and you rubbed your eye, your chance of catching HIV would be so small it would be almost nonexistent. In your case, though, there’s no risk at all, because remember, any HIV that had been on the bedsheet before would be long gone by now.
If you’re worried, of course, you should get an HIV test, but you’ll be fine.
Let me tell you, there are really only two ways you can get HIV nowadays, really. You either share needles with an HIV positive person, or you have unprotected sex without a condom with an HIV positive person. If you don’t do either of those two things, your chance of becoming HIV positive is next to nothing.