Oral sex is NOT a risk for HIV.
The scratch is NOT a risk, even if there had been a small amount of blood.
Fingering is NOT a risk for HIV.
You do NOT need to test for HIV because you NEVER had a risk.
Why don't you use a condom for the oral sex which would eliminate ALL your concerns about HIV?
You can totally stop worrying, Bimmy. NONE of your activities are a risk for HIV.
Regards,
RubyWitch