Welcome -- but this question should be in the HIV Prevention and Safe Sex Forum; this forum is limited to STDs other than HIV. I'll see if it can be moved. The news is good, through: your test results are definitive. You do not have HIV and have been worrying needlessly.
You had a zero risk exposure; scan or search other threads for other discussions of fingering with or without wounds on the fingers or hands. This is true even if the woman involved has HIV -- which, if you are in the US, is statistically very unlikely. As for your symptoms and your CBC results, there is nothing that suggests HIV.
Most important, your HIV blood tests are 100% proof you weren't infected. You do not need any more tests at 12 weeks or any other time. The common advice for final testing at 3 months applies only when antibody tests are the only ones done. With negative PCR as well as antibody, your negative results are definitive. See the thread linked below.
Your blood count was basically normal, and your lymphocyte count is not significantly low -- but in any case, you are wrong about low lymphocytes affecting HIV test performance. But even if it were not, even if your symptoms were typical for HIV, and even if you had a true high risk exposure, it wouldn't matter. The HIV tests are among the most accurate diagnostic tests ever developed and the results overrule all other factors.
Those comments answer your questions -- but to be explicit so there is no possibility of misunderstanding: 1) Your HIV test results are conclusive. 2) Those symptoms are not even close to what is expected in people with HIV. Something else is the cause.
I would bet your doctor has told you pretty much the same thing. You really need not be at all worried, and you should be continuing unprotected sex with your fiance with no worry about infecting her.
I hope this has helped resolve your fears. Best wishes -- HHH, MD