Vaping: safe while pregnant?

Ive been a smoker for 11 years and since finding out I was pregnant (2 weeks ago) I've stopped completely but I'm finding at times of stress I could literally kill for a fag 😣. I feel as though those times of stress are not good for baby so was wondering as I definitely do not want to smoke, a vape thing with no nicotine etc is safe? Not something to be used all the time just if needed rather than stressing?