Welcome to health care magic!
From your question it looks like you have developed some kind of food poisoning or allergic reaction
to the frozen yogurt.
You are feeling nausea, and head and ears began to feel warm...Taking ibuprofen will not do much except decrease the reaction of your body to infection....but not cure it..
From my clinical experince I can say that if it possible, please vomit out, this will help in clearing your stomach of yogurt which is not absorbed and reduce the effect.
Had I been treating you I would start you on an antibiotic as you have started feeling feverish, this will curb the infection; along with that start paracetamol
500 mg for fever..An antacid with an antiemetic , like Omeprazole
will take care of nausea, gastritis
It is not uncommon to get infection by eating frozen foods...do take care next time you do so...many times the temperature is not maintained adequately while storing them and food gets spoiled. However, donot worry, with treatment you will get completely well..
Hope the reply is useful
feel free to ask more questions
Dr. Manisha Gopal