Help! What to expect?

Madison💁🏼‍♀️ • Retailer// Married 6 yrs// Mommy to fraternal twin girls// surprise baby on the way!
I see the doctor today for the first time in over a month. I know I won't be getting an ultrasound since he doesn't want one again until 20 weeks. I'm hoping he will at least use the Doppler so I know they are still in there. Do you think he would be able to get both heartbeats at 12 weeks? If he can't find both, should I ask for ultrasound? 
This is my first pregnancy and I have no idea what to expect for today's appointment. I pray my babies are still fine. Haven't seen them since 8 weeks.