Very nervous about 12 week ultrasound!?

I having my 12 week ultrasound tomorrow but I am very nervous bc last yr I had a missed miscarriage. I haven't experienced any bleeding it cramping but I just don't feel pregnant anymore. My morning sickness has completely disappeared since 10 weeks and when I wake up in the mornings I don't feel there is anything in there :/ my bbs r still sore though..k just need some kind words and support please. I'm so nervous and I can't head the heartbeat with a doppler my friend let me borrow.