Hello Sunair2002,
The most likely cause, by far, is that you had some viral suppression of your bone marrow. This is very, very common and occurs with many viral infections. Recovery is the rule.
Unless you are having other symptoms concerning for
leukemia (weight loss, night sweats,
pain in your bones, etc.) the best thing is to simply have it repeated in May. I'm confident it will be normal then.
Best wishes.
Advice and opinions given are based on the information provided and must not be used as an official medical recommendation. The limitations of the internet prevent an appropriate evaluation. Always consult your doctor if there is concern.