I have the Blu e cig/Vape kit (picture below)

My husband and I have been ttc for almost 10 months, I've been using it on and off for a while now ( tanks have 2.4% nicotine), is it safe to vape while ttc and if I get pregnant can I switch to the non nicotine ones(0.0%) to still enjoy my blu without inhaling nicotine? (the other ingredients in the flavor tanks are Propylene Glycol and Vegetable Glycerin, Natural and Artificial Flavors, Distilled Water)