For those taking Unisom and Vit. B. Did it start working right away or did it take a few days? I started Vit. B over the weekend and last night after a day of not even being able to keep down water I tried Unisom and Vit. B. Today I haven't puked but I've had a constant feeling like I might at any momment. This time around is so much worse and the most horrible part is feeling like a bad mom because I cant play like I used to.