HIV infection

Hello
I'm 22 years old ( male )
I had a protected Vaginal sex with a sex worker in indonesia almost 2/5 months ago . now i'm really afraid about HIV infection .  I used Condom but in fingered her Vagin at least for 5 Min, after that i washed my hands But i saw an small cut on my fingernail .. the cut approximetaly healed but i'm really scared right now . i went to the doctor last week & tested with ELISA HIV TEST the result is NEGATIVE after 2/1 months .. My Question IS :
1 ) Is it necessary to tested again ?
2 ) Can i trust to this Negative result ?
3 ) How much is the chance of transmission by fingering with an small cut on finger ?

Mori
Regards for your response

[josejose1357]

1) You should get for HIV after 3 months post exposure to get conclusive result.
2) Yes. If you are getting anxious test again after 6 months post exposure and forget about it then.
3) I dont think you can get HIV this way with a small cut.