I'm having the same problem. I'm on day 17 of nausea right now. All blood work is normal. my EGD, and CT of abdomen are normal....The doctor has me on an antacid, but that really hasn't given me any relief. My symptoms are typically worse in the mornings and sometimes clear in the late afternoon, but not always. The last 3 days have been non stop.
I have an appoitment with another Gastrologist on the 18th - hopefully, he'll have something. If you find anything out, will you PLEASE inform me? I, too, have become depressed from all the nausea and the not knowing. I feel as if Im wasting my life in bed.
She should try elevating her head when she sleeps. You can try talking to your doctor about a medicine like Zofran to take when she gets nauseous.