I think it's better to be safe than sorry. A few years ago, my father had similar symptoms. I took him to one ER, and told them I suspected he had a TIA. They diagnosed him with a urinary tract infection, and refused to do a CT. I took him to another ER, and demanded that they do a CT. It showed that he was having TIAs. They put him on Plavix, and some other meds to minimize the chance of him having a major stroke.