When Unisom stops working

Amanda
I have been taking Unisom for about 2 weeks at night to help with nausea. At first, it worked wonders, however the nausea is starting to take over again. I threw up this morning. What else has worked for you ladies? The Unisom works to a degree, but I feel like my morning sickness is just getting more intense, and the Unisom can only do so much.