Finding out the sex

So I'll be 14 weeks 4 days on Christmas... I plan to ask my doctor at my next appt if we can try to schedule an appt for 14 weeks 2 days to find out the sex and announce to our family on Christmas Day. I'm keeping my fingers crossed that he'll be fine with it & we can see something! Do you think it's a waste of time to go that early or have any of you had luck finding out at 14 weeks?