Thank you for the additional information.
If she is passing stool that is a good sign. With a full blockage we normally see the inability to pass stool and with a partial blockage you may see diarrhea.
This is not to say for sure this has not become lodged if she did in fact eat the second one.Hopefully this has just caused some irritation to the intestines or stomach.
Little dogs really need to eat 3 times per day to help maintain a proper blood glucose levels and prevent acid build up in the stomach.
If she has always had days were she does not eat that could be due to a medical problem such as a liver shunt and should be discussed with your vet.
If she is eating and passing stool you can try to treat the vomiting at home. I would suggest trying 1/4 of a 10mg Pepcid AC and see if this calms the stomach and gets her more interested in food. You can add 1/2 teaspoon of Metamucil to her food . If there is a ear plug still in the digestive tract this may help to move it through.
I would feed a bland diet of boiled chicken and rice ( or boiled hamburger) for the next 2 days. If she does not eat today or has any additional bouts of vomiting I would have her seen by the vet for x rays to be sure that one of the ear plugs is not still in the intestines causing a problem.
I hope all goes well, please reply back if you have additional questions