Appointment in 2 days

I have my appointment in 2 days where I can find out what I’m having from doing the blood test. I am so nervous everytime I have a appointment that there will be no heartbeat. I’m 20 weeks pregnant I feel baby sometimes I think it just feels like little light kicks bellow my belly button. But it’s not often so I get worried. I don’t know where my placenta is located i know that’s what could stop me from feeling baby. Anyone else feel anxious and nervous anytime they go to a appointment?