I totally understand what you mean about the age concerns......I'm 46 but already anticipating the comments if I go ahead with DE on the timeline I'm planning... I'll be 47 or 48 if I deliver....
There have been a number of recent posts about age concerns....you should browse back a couple of pages, but you'll see you're definitely not alone
FWIW I would definitely wait the three months before telling anyone....you just can't be too careful....
But hopefully all will go well and you're already on your way to motherhood with today's transfer.
Good luck !