
My grandfather just died, unexpectedly. All of the details aside...
We have our appointment to get my son's US passport on Wednesday (leaving for London tomorrow.)
My big brother wants to pay for any additional costs associated with changing our flights so I can attend the funeral (my grandmother died while I was pregnant and I was unable to, but since I already have tickets booked for the States, it makes it easier to this time in a way), which will be the start of July. We'd be keeping my husband's tickets as they are (September 13th leaving) but change me and my sons to likely June 28th!
So, that is just over three weeks away.
I know that the US Embassy asked before making my appointment if I was planning to travel within two weeks (at the time I wasn't so obviously didn't check that.)
But now it is possible I will be traveling within three weeks from the date of the US embassy appointment.
What do I do? Do I just change the date on the application form for intended date of travel and explain to them at the appointment what has gone on? Will there be an increased fee to receive his passport?? Anyone know? Or anyone know a number I can call?!
Everything is happening so quick and being the appointment is only on Wednesday, I need to figure this out quickly.

I've spoken to the airline, and obviously I can change me and my son's ticket and keep my husband's the same (we're going to be apart for over two months, which will be so hard on all of this, but at the same time, this is really important to me), but in terms of getting my son's passport in time?
Thanks for reading my freak-out...