First trimester vomiting

I'm on diclegis I take two at night. I can't take one in the morning because I'm already sleeping and exhausted during the day. I'm 6 weeks 3 days. I've lost two babies, first at 6.4, second a week after I found out I was pregnant. I vomited all day yesterday. Couldn't hold anything down. I've eaten two biscuits this morning and drank a glass of water. I feel totally drained. I'm scared of getting dehydrated and losing this baby. I'm emotional and cried all day yesterday and crying again today. I see my ob on Tuesday and plan to talk to him about this then. Any tips? Nothing sounds good right now but I'm so hungry.