Sentence 1: My goldfish was behaving weirdly. 
 Sentence 3: I went to the vet and bought medicine for the pet 
 Sentence 4:  I went back home and put the medicine in the water 
 Sentence 5:  After a few days of this, the fish got better again 
 Option 1: I called the vet and he said the fish was sick. 
 Option 2: I called the ER and said the fish was sick.