I'm going through the same thing, currently 6 weeks and not able to keep anything down. I tried eating a few pieces of raw ginger, it calmed my nausea for a while. I've heard ginger is quite effective, you can try it out
I boiled ginger water and took sips when I feel nauseous!
Can try lemon water. I felt nauseous for the past week and tried lemon water ytd and it works for me.
Susanna Vale