ALL Medical doctors will tell you you should not vape nor smoke while pregnant. I am a nursing assistant and while vaping was not available while I was pregnant in the early 90's I would have to say NO. I would also say ask your OBGYN as they WILL tell you to stop. However, it is safer and I would NEVER suggest going on patches, gums, or lozenges as they contain the same freebase nic we use and all medications like prenatals have PG in them to keep them preserved. VG is in all food products. HOWEVER if you are a nic salt user QUIT!! Since JUUL is 50 nic it is NOT good for your baby at all.
Hope this helps coming from a nursing assistant, paramedic, and a vaping lobbyist. DO what's best for your child and that's don't drink, do drug, smoke or vape. This precious gift needs to have the absolute best start they can get!!
Good luck and my in box is always open <3