Lost over 6lbs in a week

I am a little over 6 weeks pregnant and I have not been able to keep anything down including water for a little over a week. I feel like death, I’m so thirsty but puke if I even sip on water. What can I do? My doc prescribed me phenergen, but I remembered my blood pressure dropped and I passed out when I took it when I was younger. I have to wait til tomorrow to call and request something else. What can I do? What helped y’all if this happened to you? I just want to eat and drink. I can’t even think about food without gagging. I’m MISERABLE 😭