Flu Test If You Test Negative For Regular Flu, Could You Still Have Swine Flu? Are They The Same Or Different Tests?

If you test negative for regular flu, could you still have swine flu? Are they the same or different tests? - flu test

All the symptoms seem to be the same H1N1. 102 fever, cough, sore throat, headache, dizziness .. Influenza test was negative. each of my children have a fever a day or two to share with similar symptoms. This is not the flu?