Losing weight

I’m 6 weeks 2 days today and in the last 5 days, I’ve lost 6lbs. My weight never fluctuates under 145lbs by now I’m 139. I can’t eat much of anything, I’m lucky if I can get myself to eat half a bowl of soup. I have already been to the ER twice for fluids. Idk what to do. I’ve had two boys and neither pregnancy did I lose weight like this. What should I do? Honestly my medical cannabis and my zofran are the only things keeping me alive right now. This sucks.