QUERY REGARDING TLC. A low tlc count?

I was injected by a contaminated needle by a doctor on 27th of June 2019. On 07 Aug 2019 I suddenly got fever around  100.5° F and I didn't have any other symptoms such as cold, cough etc.Just fever out of nowhere. On 09 Aug 2019 i.e. right after 42 days I went for few test and my TLC count was 4000 i.e. on borderline . I never ever had a TLC below 5200. Typhidot, dengue, chikungunya and Malarial parasite QBC all are negative. I also went for an hiv test on the 42nd day and it came out to be negative. The test was a rapid card test whose report is attached for your perusal please. Can after 42 days we expect an accurate result of HIV from HIV card test? Are there any other reason because of which TLC count comes low ? Does a person with tuberculosis have a low TLC count ?