my dog is a Maltese x Shih Tzu dog, who is 4 years old. She is usually energetic and extremely playful, but during the last couple of weeks, she has been vomiting and been picked on by children. Since yesterday (22nd of July), I have not been able to pick her up without her yelping. I took a look at her and nothing looks wrong, so what could it be? I don't want to go to the vet if something alternative can be done...