After you have tried eating small protein packed meals, crackers and hard candy another option might be this little fruit from Japan.
We called our local Asian/International grocery store to ask for “OO-meh BOH-shee”, which means ‘dried plum’. This is the container we found:
The sour and salt combo seems to calm the nausea. The fruit can be eaten itself or put into a scrambled egg or rice. If that is too much at first, just suck on the pit!!
Check out Dining Miss Jenna, she has really great info on Umenboshi.