I NEED food!!! 😭😭

Wi

I am 11weeks and going on about a week now I have never vomited so much in my life!! I have lost almost 15lb since being pregnant (yes my doctors know I have lost weight) but at what point does “morning sickness” become more serious. I can hardly eat only thing I can hold down is peanut butter sandwiches and crackers. I try to drink water but I seriously sleep 15-20hours a day so it’s hard I’m worried about getting dehydrated. What should I do?!?