Welcome to e health forum.
As mentioned earlier, you are not at risk of having HIV infection, since HIV is not spread from fingering (which is the same as masturbation).
A one week old cut, would have healed completely and would not be at risk of HIV transmission.
And tonsillitis, in your case is due to bacterial infection, for which, you should consult a ENT doctor, and get a prescription of antibiotics for proper clearing of the infection. If the problem is recurrent, your doctor can also have them removed with a minor surgery.