Clitoral itching is fairly common during pregnancy. It may be due to hormonal changes or increased blood volume and blood flow. Both of these things contribute to increased vaginal discharge. Your risk of vaginal infection, including BV and yeast infection, also increases during pregnancy.
Vaginal itching during pregnancy is often nothing to worry about and can often be resolved with at-home treatments.
However, during this time it may make sense to be especially proactive and talk with your doctor about any troubling symptoms you experience.