["I'm waiting to hear back if I could get earlier flight tickets to my friend's wedding", "Uh oh!  What happens if you can't get an earlier flight?  Will you miss the wedding?", "It will be very close. I won't have to time to relax from the flight before the wedding."]
I would be feeling quite anxious if I were you!  I am sure it will work out for you!
I'm waiting to hear back if I could get earlier flight tickets to my friend's wedding.