Pregnant again after 2 miscarriages

So I had my first prenatal appointment yesterday, she said everything looked good so far, my uterus feels about 6 weeks which is what I am. I go in Monday for an ultrasound, I'll be 7 weeks. I'm super nervous I just want to see the heartbeat. My first pregnancy everything was fine but I was super stressed and not eating enough and I when I went in for my 12 week checkup there wasn't a heartbeat. My 2nd pregnancy, the baby didn't implant correctly so we never saw the baby. This pregnancy feels different you know. I feel like this is good and there will be a heartbeat maybe even two lol. Anyone else have 2 miscarriages then go on to have a healthy baby?