I need help.

I'm 2 months today and very happy. I'm am usually a very active, happy and outgoing person. But ever since finding out I'm am constantly moody and cannot eat anything. I've tried the nausea pills and not even they have helped. Soup, broth nor crackers stay down and I know I'm not getting anywhere close to the nutrients I'm suppose to be getting into me for this baby. This is baby #3 and my first time ever dealing with nausea ever! First 2 babies were a breeze. Any suggestions will help because I'm hungry but cannot keep food down. ?