3 hour Glucose Tolerance Test

Anyone with insight on the 3 hour glucose test after failing the 1 hour?  Any passers the second time around?.  I failed my 1 hour glucose screening a few days ago and have to go in for the 3 hour stupidity test tomorrow morning.  I never had this issue with the last 2 pregnancies.  I am a runner and work out 5 times a week..and eat healthy. I'm not sure why I failed but anxiously awaiting this test to be done. 🙄