Is a WBC if 4.6 okay?

My husband and I are TTC and I had bloodwork done because I had some random bruises appearing on my legs. Everything came back normal but my WBC was 4.6 and Neutrophils were 2.5. From what I understand, this is within normal range (4-11) but just barely. Last year my level was 8.5. I read if it falls below 4.5 it could impact someone’s ability to fight infection. I’m worried that it will drop more if I were to get pregnant. I meet with my next week but I’m wondering in the meantime if anyone has any insight?