I am HIV positive. Why are my WBC not affected?

Hello doctor,

I am a young woman and I recently discovered that I am HIV (Human Immunodeficiency Virus) positive after I turned 21. When I told my mother about it, she confessed that she had known since I was 16 and that my father died of AIDS (Acquired Immunodeficiency Syndrome) whilst she has been on ART for almost a decade now. They realized my status after I got tested since I was having frequent abscess wounds or boils, almost on a monthly basis but they never told me about it. I am a health student and interact with a lot of health professionals hence my hesitation to seek help to start treatment just in case I meet up with someone I know. However, my major concern is that I have recently been having drowsiness spells and frequent, almost consistent headaches though they are very light. An FBC (Full Blood Count) test done a month ago showed that my Hb and HCT, as well as my neutrophil count, were slightly below normal and I was advised to go on a month of Saferon tablets which I followed religiously. Recent full blood tests showed that my RBC (Red Blood Cells), Hb(Haemoglobin), HCT(Hematocrit Test), MCV (Mean Corpuscular volume), and MCH(Mean Corpuscular Hemoglobin) values were all now slightly below normal whilst all my WBC were within the normal range. The Hb and HCT went lower than the initial test. Therefore, my questions are, might this be related to my HIV positive status and how so? Also if it is,why is it that my white blood cells are not affected? I am mostly curious about whether such an instance as mine is quite common where a patient is born with HIV and lives an otherwise normal livelihood though with more frequent infections that go away after some time? I really do hope to hear from you. I am now 22 and have accepted my condition and forgiven my parents. I am trying to, however, get as much information and understanding about my condition hence contacting you. I sincerely thank you for your time.